diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 6e0da56..ae2746f 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -559,6 +559,53 @@ fn create_project_full_in(
   Ok(())
 }
 
+/// Verlegt den Projektordner: Registry-Eintrag auf den neuen Pfad; Verweise
+/// auf den alten Root in der settings.json (autoMemoryDirectory,
+/// Edit-Permission) ziehen mit. Verschoben wird nichts — der neue Ordner
+/// muss existieren.
+fn set_project_dir_in(paths: &Paths, name: &str, dir: &str) -> Result<(), String> {
+  check_name(name)?;
+  let new_dir = expand_home(paths, dir);
+  if !new_dir.is_dir() {
+    return Err(format!("Ordner nicht gefunden: {}", new_dir.display()));
+  }
+  let mut reg = load_registry(paths)?;
+  let old_dir = reg
+    .get(name)
+    .cloned()
+    .ok_or_else(|| format!("Projekt nicht registriert: {name}"))?;
+  if old_dir == new_dir {
+    return Ok(());
+  }
+  reg.insert(name.to_string(), new_dir.clone());
+  save_registry(paths, &reg)?;
+
+  let sp = settings_path(&new_dir);
+  if !sp.is_file() {
+    return Ok(()); // importierte Projekte ohne settings.json
+  }
+  let old_c = contract_home(paths, &old_dir);
+  let new_c = contract_home(paths, &new_dir);
+  let raw = fs::read_to_string(&sp).map_err(|e| format!("{}: {e}", sp.display()))?;
+  let mut v: serde_json::Value =
+    serde_json::from_str(&raw).map_err(|e| format!("{}: {e}", sp.display()))?;
+  if let Some(mem) = v["autoMemoryDirectory"].as_str() {
+    if let Some(rest) = mem.strip_prefix(&old_c) {
+      v["autoMemoryDirectory"] = serde_json::json!(format!("{new_c}{rest}"));
+    }
+  }
+  if let Some(allow) = v["permissions"]["allow"].as_array_mut() {
+    let old_edit = format!("Edit({old_c}/**)");
+    for e in allow.iter_mut() {
+      if e.as_str() == Some(&old_edit) {
+        *e = serde_json::json!(format!("Edit({new_c}/**)"));
+      }
+    }
+  }
+  let raw = serde_json::to_string_pretty(&v).map_err(|e| e.to_string())?;
+  fs::write(&sp, raw + "\n").map_err(|e| format!("{}: {e}", sp.display()))
+}
+
 /// Nimmt einen bestehenden Ordner als Projekt auf; der Name ist der Ordnername.
 fn add_project_in(paths: &Paths, path: &str) -> Result<(), String> {
   let dir = expand_home(paths, path);
@@ -1544,6 +1591,15 @@ fn remove_project(name: String) -> Result<(), String> {
   unregister_project(&Paths::real(), &name)
 }
 
+/// Projektordner neu zuordnen; bei laufender Session gesperrt.
+#[tauri::command]
+fn set_project_dir(project: String, dir: String) -> Result<(), String> {
+  if is_running(&project) {
+    return Err(format!("{project} läuft noch — erst beenden"));
+  }
+  set_project_dir_in(&Paths::real(), &project, &dir)
+}
+
 #[tauri::command]
 fn add_work_dir(project: String, dir: String) -> Result<(), String> {
   add_work_dir_in(&Paths::real(), &project, &dir)
@@ -1906,6 +1962,7 @@ fn main_builder() -> tauri::Builder<tauri::Wry> {
       remove_project,
       delete_project,
       project_work_dirs,
+      set_project_dir,
       add_work_dir,
       remove_work_dir,
       list_pools,
@@ -2753,6 +2810,24 @@ mod tests {
     assert!(p.home.join("projects/extra").is_dir());
   }
 
+  #[test]
+  fn projektordner_verlegen() {
+    let p = tmp_paths();
+    create_project_full_in(&p, "proj", None, None, None, false, TerminalConfig::default(), false)
+      .unwrap();
+    // Nutzer hat den Ordner selbst verschoben; die App ordnet nur neu zu.
+    let new_dir = p.home.join("elsewhere").join("proj");
+    fs::create_dir_all(p.home.join("elsewhere")).unwrap();
+    fs::rename(p.projects_dir().join("proj"), &new_dir).unwrap();
+    set_project_dir_in(&p, "proj", &new_dir.to_string_lossy()).unwrap();
+
+    assert_eq!(project_dir(&p, "proj").unwrap(), new_dir);
+    let raw = fs::read_to_string(settings_path(&new_dir)).unwrap();
+    assert!(raw.contains("~/elsewhere/proj/memory"));
+    assert!(raw.contains("Edit(~/elsewhere/proj/**)"));
+    assert!(!raw.contains("claude-projects/proj"));
+  }
+
   #[test]
   fn projekt_loeschen_unbekannt_scheitert() {
     let p = tmp_paths();
diff --git a/src/components/ProjectList.vue b/src/components/ProjectList.vue
index 57a3934..be0a594 100644
--- a/src/components/ProjectList.vue
+++ b/src/components/ProjectList.vue
@@ -182,6 +182,22 @@ async function openSettings(p: Project) {
   }
 }
 
+// Projektordner neu zuordnen (Root, in dem die Session startet); verschoben
+// wird nichts — der gewählte Ordner ist der neue Ort des Projekts.
+async function changeProjectDir() {
+  const s = settings.value!;
+  const dir = await open({ directory: true, multiple: false });
+  if (typeof dir !== "string") return;
+  try {
+    await invoke("set_project_dir", { project: s.name, dir });
+    await refresh();
+    const p = projects.value.find((x) => x.name === s.name);
+    if (p) s.path = p.path;
+  } catch (e) {
+    error.value = String(e);
+  }
+}
+
 // Arbeitsordner schreiben direkt in die Projekt-settings.json
 // (additionalDirectories + Edit-Permission) — kein Speichern-Schritt.
 async function addWorkDir() {
@@ -624,6 +640,7 @@ onUnmounted(() => window.clearInterval(timer));
         <span class="workdirs">
           <span class="icon-row">
             <span class="icon-path">{{ settings.path }}</span>
+            <button @click="changeProjectDir">{{ $t("projects.changeDir") }}</button>
           </span>
           <span v-for="wd in settings.workDirs" :key="wd" class="icon-row">
             <span class="icon-path">{{ wd }}</span>
diff --git a/src/i18n.ts b/src/i18n.ts
index 05c4253..0273141 100644
--- a/src/i18n.ts
+++ b/src/i18n.ts
@@ -54,6 +54,7 @@ const de = {
     addFolder: "Projekt importieren …",
     addFolderTitle: "Bestehenden Ordner als Projekt aufnehmen",
     addWorkDir: "Ordner hinzufügen …",
+    changeDir: "Ändern …",
     wizardTitle: "Neues Projekt",
     name: "Name",
     projectDir: "Projektordner",
@@ -177,6 +178,7 @@ const en: typeof de = {
     addFolder: "Import project …",
     addFolderTitle: "Add an existing folder as a project",
     addWorkDir: "Add folder …",
+    changeDir: "Change …",
     wizardTitle: "New project",
     name: "Name",
     projectDir: "Project folder",