diff --git a/electron/main/index.ts b/electron/main/index.ts
index d161377..4d1f51b 100644
--- a/electron/main/index.ts
+++ b/electron/main/index.ts
@@ -109,7 +109,6 @@ if (!app.requestSingleInstanceLock()) {
 
 interface Workspace {
   projectPath?: string;
-  files: { path: string; active: boolean }[];
   window: BrowserWindow;
 }
 
@@ -244,27 +243,7 @@ ipcMain.handle("open-win", (e, arg) => {
 ipcMain.handle("ready-to-show", (e) => {
   const workspace = windows.find((v) => v.window.webContents.id === e.sender.id);
   if (workspace && workspace.projectPath) {
-    workspace.window.webContents.send("open-project", workspace.projectPath, workspace.files);
-  }
-});
-
-ipcMain.handle("open-file", (e, path: string) => {
-  const workspace = windows.find((v) => v.window.webContents.id === e.sender.id);
-  if (workspace) {
-    const entry = workspace.files.find((v) => v.path === path);
-    workspace.files.forEach((v) => (v.active = false));
-    if (entry) {
-      entry.active = true;
-    } else {
-      workspace.files.push({ path, active: true });
-    }
-  }
-});
-
-ipcMain.handle("close-file", (e, path: string) => {
-  const workspace = windows.find((v) => v.window.webContents.id === e.sender.id);
-  if (workspace) {
-    workspace.files = workspace.files.filter((v) => v.path !== path);
+    workspace.window.webContents.send("open-project", workspace.projectPath);
   }
 });
 
diff --git a/src/components/editor.tsx b/src/components/editor.tsx
index dee4fb6..2577d22 100644
--- a/src/components/editor.tsx
+++ b/src/components/editor.tsx
@@ -144,7 +144,7 @@ export const Editor: FC<EditorProps> = ({ onChange, data: editor, ...props }) =>
       e.preventDefault();
       e.stopImmediatePropagation();
       e.stopPropagation();
-      editor.dispatch(hotkeyMap[key]);
+      editor.dispatch?.(hotkeyMap[key]);
     }
   );
 
@@ -153,7 +153,7 @@ export const Editor: FC<EditorProps> = ({ onChange, data: editor, ...props }) =>
       return;
     }
     e.stopPropagation();
-    editor.dispatch(hotkeyMap[key]);
+    editor.dispatch?.(hotkeyMap[key]);
   });
 
   const searchInputRef = useRef<InputRef>(null);
@@ -493,7 +493,7 @@ export const Editor: FC<EditorProps> = ({ onChange, data: editor, ...props }) =>
       )}
 
       <Dropdown
-        menu={{ items: menuItems, onClick: (info) => editor.dispatch(info.key as EditEvent) }}
+        menu={{ items: menuItems, onClick: (info) => editor.dispatch?.(info.key as EditEvent) }}
         trigger={["contextMenu"]}
       >
         <div tabIndex={-1} style={{ width: "100%", height: "100%" }} ref={graphRef} />
diff --git a/src/components/explorer.tsx b/src/components/explorer.tsx
index ef09d8a..4ca2ce9 100644
--- a/src/components/explorer.tsx
+++ b/src/components/explorer.tsx
@@ -105,11 +105,11 @@ const renameFile = (oldPath: string, newPath: string) => {
       for (const editor of workspace.editors) {
         if (isDirectory) {
           if (editor.path.startsWith(oldPath)) {
-            editor.dispatch("rename", editor.path.replace(oldPath, newPath));
+            editor.dispatch?.("rename", editor.path.replace(oldPath, newPath));
           }
         } else {
           if (editor.path === oldPath) {
-            editor.dispatch("rename", newPath);
+            editor.dispatch?.("rename", newPath);
           }
         }
       }
@@ -406,12 +406,12 @@ const doMoveFile = (path: string, newPath: string) => {
     fs.renameSync(path, newPath);
     for (const editor of workspace.editors) {
       if (editor.path.startsWith(path)) {
-        editor.dispatch("rename", destDir + "/" + Path.basename(editor.path));
+        editor.dispatch?.("rename", destDir + "/" + Path.basename(editor.path));
       }
       console.log("editor move", editor.path === newPath, editor.path, newPath);
       if (editor.path.startsWith(newPath)) {
         console.log("editor reload", editor.path === newPath, editor.path, newPath);
-        editor.dispatch("refresh");
+        editor.dispatch?.("refresh");
       }
     }
   };
diff --git a/src/components/inspector.tsx b/src/components/inspector.tsx
index 4232276..965b506 100644
--- a/src/components/inspector.tsx
+++ b/src/components/inspector.tsx
@@ -105,7 +105,7 @@ const VarDeclItem: FC<VarItemProps> = ({ name, onChange, onRemove, disabled, ...
             borderTop: "1px solid #3d506c",
             borderBottom: "1px solid #3d506c",
           }}
-          onClick={() => value.name && editing?.dispatch("clickVar", value.name)}
+          onClick={() => value.name && editing?.dispatch?.("clickVar", value.name)}
         >
           <AimOutlined />
           <span style={{ marginLeft: 4 }}>{value?.count ?? 0}</span>
@@ -254,7 +254,7 @@ const TreeInspector: FC = () => {
 
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
   const finish = (values: any) => {
-    workspace.editing?.dispatch("updateTree", {
+    workspace.editing?.dispatch?.("updateTree", {
       name: values.name,
       desc: values.desc,
       export: values.export,
@@ -812,7 +812,7 @@ const NodeInspector: FC = () => {
       data.output = [];
     }
 
-    workspace.editing?.dispatch("updateNode", {
+    workspace.editing?.dispatch?.("updateNode", {
       data: data,
     } as EditNode);
   };
@@ -1500,7 +1500,7 @@ const NodeInspector: FC = () => {
               type="primary"
               style={{ width: "100%" }}
               icon={<EditOutlined />}
-              onClick={() => workspace.editing?.dispatch("editSubtree")}
+              onClick={() => workspace.editing?.dispatch?.("editSubtree")}
             >
               {t("editSubtree")}
             </Button>
diff --git a/src/components/menu.tsx b/src/components/menu.tsx
index e3ec4e5..1d7386b 100644
--- a/src/components/menu.tsx
+++ b/src/components/menu.tsx
@@ -29,8 +29,8 @@ const getFocusedWebContents = () => {
   return BrowserWindow.getFocusedWindow()?.webContents;
 };
 
-ipcRenderer.on("open-project", (_, dir, files) => {
-  useWorkspace.getState().init(dir, files);
+ipcRenderer.on("open-project", (_, dir) => {
+  useWorkspace.getState().init(dir);
 });
 
 ipcRenderer.on("refresh-app-men", () => {
diff --git a/src/components/workspace.tsx b/src/components/workspace.tsx
index 53352fa..713644f 100644
--- a/src/components/workspace.tsx
+++ b/src/components/workspace.tsx
@@ -80,12 +80,12 @@ export const Workspace: FC = () => {
 
   useKeyDown(Hotkey.SearchNode, keysRef, (event) => {
     event.preventDefault();
-    workspace.editing?.dispatch("searchNode");
+    workspace.editing?.dispatch?.("searchNode");
   });
 
   useKeyDown(Hotkey.JumpNode, keysRef, (event) => {
     event.preventDefault();
-    workspace.editing?.dispatch("jumpNode");
+    workspace.editing?.dispatch?.("jumpNode");
   });
 
   useEffect(() => {
@@ -118,7 +118,7 @@ export const Workspace: FC = () => {
                 type="primary"
                 onClick={() => {
                   editor.alertReload = false;
-                  editor.dispatch("reload");
+                  editor.dispatch?.("reload");
                   alert.destroy();
                   keysRef.current?.focus();
                   setShowingAlert(false);
@@ -164,7 +164,7 @@ export const Workspace: FC = () => {
             <Button
               type="primary"
               onClick={() => {
-                editor.dispatch("save");
+                editor.dispatch?.("save");
                 workspace.close(editor.path);
                 alert.destroy();
                 keysRef.current?.focus();
@@ -232,7 +232,7 @@ export const Workspace: FC = () => {
             <Button
               type="primary"
               onClick={() => {
-                unsaves.forEach((editor) => editor.dispatch("save"));
+                unsaves.forEach((editor) => editor.dispatch?.("save"));
                 alert.destroy();
                 window.close();
                 setShowingAlert(false);
diff --git a/src/contexts/setting-context.ts b/src/contexts/setting-context.ts
index 56ed09e..d3bdf2c 100644
--- a/src/contexts/setting-context.ts
+++ b/src/contexts/setting-context.ts
@@ -7,10 +7,21 @@ import { useWorkspace } from "./workspace-context";
 
 const settingPath = app.getPath("userData") + "/settings.json";
 
+export type OpenEditor = {
+  path: string;
+  active: boolean;
+};
+
+export type ProjectSetting = {
+  path: string;
+  buildDir: string;
+  editors: OpenEditor[];
+};
+
 export type SettingModel = {
   recent: string[];
-  buildDir: string;
   layout: NodeLayout;
+  projects: ProjectSetting[];
 };
 
 export type SettingStore = {
@@ -20,8 +31,12 @@ export type SettingStore = {
   save: () => void;
   appendRecent: (path: string) => void;
   removeRecent: (path: string) => void;
-  setBuildDir: (dir: string) => void;
   setLayout: (layout: "compact" | "normal") => void;
+  setBuildDir: (project: string, dir: string) => void;
+  getBuildDir: (project: string) => string;
+  openEditor: (project: string, path: string) => void;
+  closeEditor: (project: string, path: string) => void;
+  getEditors: (project: string) => OpenEditor[];
 };
 
 export const useSetting = create<SettingStore>((set, get) => ({
@@ -29,22 +44,25 @@ export const useSetting = create<SettingStore>((set, get) => ({
     recent: [],
     buildDir: "",
     layout: "compact",
-    checkExpr: true,
+    projects: [],
   },
   load: () => {
     try {
       if (fs.existsSync(settingPath)) {
         const settings = readJson(settingPath) as SettingModel;
         settings.layout = settings.layout || "compact";
+        settings.projects = settings.projects || [];
         set({ data: settings });
       }
     } catch (error) {
       console.error(error);
     }
   },
+
   save: () => {
     writeJson(settingPath, get().data);
   },
+
   appendRecent: (path: string) => {
     const { data, save } = get();
     const recent = data.recent.filter((v) => v !== path);
@@ -52,21 +70,75 @@ export const useSetting = create<SettingStore>((set, get) => ({
     set({ data: { ...data, recent } });
     save();
   },
+
   removeRecent: (path: string) => {
     const { data, save } = get();
     const recent = data.recent.filter((v) => v !== path);
     set({ data: { ...data, recent } });
     save();
   },
-  setBuildDir: (dir: string) => {
-    const { data, save } = get();
-    set({ data: { ...data, buildDir: dir } });
-    save();
-  },
+
   setLayout: (layout: "compact" | "normal") => {
     const { data, save } = get();
     set({ data: { ...data, layout } });
     save();
-    useWorkspace.getState().editing?.dispatch("refresh");
+    useWorkspace.getState().editing?.dispatch?.("refresh");
+  },
+
+  setBuildDir: (projectPath: string, dir: string) => {
+    const { data, save } = get();
+    let project = data.projects.find((v) => v.path === projectPath);
+    if (!project) {
+      project = {
+        path: projectPath,
+        buildDir: "",
+        editors: [],
+      };
+    }
+    project.buildDir = dir;
+    set({ data: { ...data, projects: data.projects } });
+    save();
+  },
+
+  getBuildDir: (project: string) => {
+    const { data } = get();
+    return data.projects.find((v) => v.path === project)?.buildDir ?? "";
+  },
+
+  openEditor: (projectPath: string, filePath: string) => {
+    const { data, save } = get();
+    let project = data.projects.find((v) => v.path === projectPath);
+    if (!project) {
+      project = {
+        path: projectPath,
+        buildDir: "",
+        editors: [],
+      };
+      data.projects.push(project);
+    }
+    const editor = project.editors.find((v) => v.path === filePath);
+    project.editors.forEach((v) => (v.active = false));
+    if (editor) {
+      editor.active = true;
+    } else {
+      project.editors.push({ path: filePath, active: true });
+    }
+    set({ data: { ...data, projects: data.projects } });
+    save();
+  },
+
+  closeEditor: (project: string, path: string) => {
+    const { data, save } = get();
+    const projectSetting = data.projects.find((v) => v.path === project);
+    if (projectSetting) {
+      projectSetting.editors = projectSetting.editors.filter((v) => v.path !== path);
+    }
+    set({ data: { ...data, projects: data.projects } });
+    save();
+  },
+
+  getEditors: (project: string) => {
+    const { data } = get();
+    return data.projects.find((v) => v.path === project)?.editors ?? [];
   },
 }));
diff --git a/src/contexts/workspace-context.ts b/src/contexts/workspace-context.ts
index 889cf24..5f3227d 100644
--- a/src/contexts/workspace-context.ts
+++ b/src/contexts/workspace-context.ts
@@ -47,7 +47,7 @@ export class EditorStore {
   alertReload: boolean = false;
   focusId?: string | null;
 
-  dispatch!: (event: EditEvent, data?: unknown) => void;
+  dispatch?: (event: EditEvent, data?: unknown) => void;
 
   constructor(path: string) {
     this.path = path;
@@ -113,7 +113,7 @@ export interface WorkspaceModel {
 }
 
 export type WorkspaceStore = {
-  init: (project: string, files?: { path: string; active: boolean }[]) => void;
+  init: (project: string) => void;
   createProject: () => void;
   openProject: (project?: string) => void;
   batchProject: () => void;
@@ -212,7 +212,7 @@ const loadFileTree = (workdir: string, filename: string) => {
 
 const saveFile = (editor?: EditorStore) => {
   if (editor?.changed) {
-    editor.dispatch("save");
+    editor.dispatch?.("save");
   }
 };
 
@@ -225,8 +225,9 @@ export const useWorkspace = create<WorkspaceStore>((set, get) => ({
   path: "",
   settings: {},
 
-  init: (path, files) => {
+  init: (path) => {
     const workspace = get();
+    const files = useSetting.getState().getEditors(path);
     if (!workspace.workdir) {
       try {
         workspace.workdir = Path.dirname(path).replaceAll(Path.sep, "/");
@@ -236,9 +237,10 @@ export const useWorkspace = create<WorkspaceStore>((set, get) => ({
         workspace.loadNodeDefs();
         workspace.watch();
         useSetting.getState().appendRecent(path);
-        if (files?.length) {
+        if (files.length) {
           for (const entry of files) {
             try {
+              entry.path = Path.posixPath(entry.path);
               const editor = new EditorStore(entry.path);
               workspace.editors.push(editor);
               if (entry.active) {
@@ -271,7 +273,7 @@ export const useWorkspace = create<WorkspaceStore>((set, get) => ({
     });
     b3util.setCheckExpr(checkExpr);
     saveWorkspace();
-    useWorkspace.getState().editing?.dispatch("refresh");
+    get().editing?.dispatch?.("refresh");
   },
 
   setupBuildScript: () => {
@@ -365,17 +367,18 @@ export const useWorkspace = create<WorkspaceStore>((set, get) => ({
 
   buildProject: async () => {
     const workspace = get();
+    const setting = useSetting.getState();
     if (workspace.path) {
       if (!buildDir) {
         buildDir = dialog.showOpenDialogSync({
           properties: ["openDirectory", "createDirectory"],
-          defaultPath: useSetting.getState().data.buildDir,
+          defaultPath: setting.getBuildDir(workspace.path),
         })?.[0];
       }
     }
     if (buildDir) {
       for (const editor of workspace.editors) {
-        editor.dispatch("save");
+        editor.dispatch?.("save");
       }
       const debug = console.debug;
       console.debug = () => {};
@@ -386,7 +389,7 @@ export const useWorkspace = create<WorkspaceStore>((set, get) => ({
         } else {
           message.success(i18n.t("buildCompleted"));
         }
-        useSetting.getState().setBuildDir(buildDir);
+        setting.setBuildDir(workspace.path, buildDir);
       } catch (error) {
         console.error(error);
         message.error(i18n.t("buildFailed"));
@@ -511,6 +514,7 @@ export const useWorkspace = create<WorkspaceStore>((set, get) => ({
 
   edit: (path, focusId) => {
     const workspace = get();
+    const setting = useSetting.getState();
     const editor = workspace.editors.find((v) => v.path === path);
     if (editor) {
       editor.focusId = focusId;
@@ -519,11 +523,11 @@ export const useWorkspace = create<WorkspaceStore>((set, get) => ({
     if (editor) {
       workspace.onEditingTree(editor);
     }
-    ipcRenderer.invoke("open-file", path);
   },
 
   close: (path) => {
     const workspace = get();
+    const setting = useSetting.getState();
     const idx = workspace.editors.findIndex((v) => v.path === path);
     const editors = workspace.editors.filter((v) => v.path !== path);
     const editor = workspace.editors.find((v) => v.path === path);
@@ -538,7 +542,7 @@ export const useWorkspace = create<WorkspaceStore>((set, get) => ({
       set({ editingNode: undefined, editingTree: undefined });
     }
     set({ editing: editting, editors: editors });
-    ipcRenderer.invoke("close-file", path);
+    setting.closeEditor(workspace.path, path);
   },
 
   find: (path) => {
@@ -605,7 +609,7 @@ export const useWorkspace = create<WorkspaceStore>((set, get) => ({
                 editor.alertReload = true;
                 set({ modifiedTime: Date.now() });
               } else {
-                editor.dispatch("reload");
+                editor.dispatch?.("reload");
               }
             }
           }
@@ -674,7 +678,7 @@ export const useWorkspace = create<WorkspaceStore>((set, get) => ({
     const workspace = get();
     b3util.initWorkdir(workspace.workdir, message.error.bind(message));
     set({ nodeDefs: b3util.nodeDefs, groupDefs: b3util.groupDefs });
-    workspace.editing?.dispatch("refresh");
+    workspace.editing?.dispatch?.("refresh");
   },
 
   // node edit
@@ -689,7 +693,9 @@ export const useWorkspace = create<WorkspaceStore>((set, get) => ({
   // tree edit
   onEditingTree: (editor) => {
     const workspace = get();
+    const setting = useSetting.getState();
     workspace.refresh(editor.path);
+    setting.openEditor(workspace.path, editor.path);
     set({
       editingTree: {
         ...editor.data,