diff --git a/xmcl-keystone-ui/src/composables/instanceJava.ts b/xmcl-keystone-ui/src/composables/instanceJava.ts
index 7c60f320a..0717010fa 100644
--- a/xmcl-keystone-ui/src/composables/instanceJava.ts
+++ b/xmcl-keystone-ui/src/composables/instanceJava.ts
@@ -29,7 +29,7 @@ export const kInstanceJava: InjectionKey<ReturnType<typeof useInstanceJava>> = S
 export function useInstanceJava(instance: Ref<Instance>, version: Ref<InstanceResolveVersion | undefined>, all: Ref<JavaRecord[]>) {
   const { resolveJava } = useService(JavaServiceKey)
 
-  const { data, mutate, isValidating, error } = useSWRV(() => instance.value.path && `/instance/${instance.value.path}/java-version?version=${version.value && 'id' in version.value ? version.value.id : undefined}`, async () => {
+  const { data, mutate, isValidating, error } = useSWRV(computed(() => instance.value.path && `/instance/${instance.value.path}/java-version?version=${version.value && 'id' in version.value ? version.value.id : undefined}`), async () => {
     return await computeJava(all.value, resolveJava, instance.value, version.value)
   }, { revalidateOnFocus: false })
 
diff --git a/xmcl-keystone-ui/src/composables/instanceLaunch.ts b/xmcl-keystone-ui/src/composables/instanceLaunch.ts
index bd4dcf5f7..619a85479 100644
--- a/xmcl-keystone-ui/src/composables/instanceLaunch.ts
+++ b/xmcl-keystone-ui/src/composables/instanceLaunch.ts
@@ -126,7 +126,7 @@ export function useInstanceLaunch(instance: Ref<Instance>, resolvedVersion: Ref<
 
     const options: LaunchOptions = {
       operationId: id,
-      version: instance.value.version || ver.id,
+      version: ver.id,
       gameDirectory: instance.value.path,
       user: userProfile.value,
       java: javaRec.path,
diff --git a/xmcl-keystone-ui/src/composables/instanceOptions.ts b/xmcl-keystone-ui/src/composables/instanceOptions.ts
index bc3afdd54..5108a8dc6 100644
--- a/xmcl-keystone-ui/src/composables/instanceOptions.ts
+++ b/xmcl-keystone-ui/src/composables/instanceOptions.ts
@@ -5,16 +5,16 @@ import { useState } from './syncableState'
 
 export const kInstanceOptions: InjectionKey<ReturnType<typeof useInstanceOptions>> = Symbol('InstanceOptions')
 
-export function useInstanceOptions(instance: Ref<Instance>) {
+export function useInstanceOptions(instancePath: Ref<string>) {
   const { editGameSetting, watch: watchOptions } = useService(InstanceOptionsServiceKey)
-  const { state, isValidating, error } = useState(() => instance.value.path ? watchOptions(instance.value.path) : undefined, GameOptionsState)
+  const { state, isValidating, error } = useState(() => instancePath.value ? watchOptions(instancePath.value) : undefined, GameOptionsState)
   const { locale } = useI18n()
 
   watch(state, (newOps) => {
     if (newOps) {
       if (newOps.lang === '') {
         editGameSetting({
-          instancePath: instance.value.path,
+          instancePath: instancePath.value,
           lang: locale.value.toLowerCase().replace('-', '_'),
           resourcePacks: newOps.resourcePacks,
         })
diff --git a/xmcl-keystone-ui/src/composables/instanceVersion.ts b/xmcl-keystone-ui/src/composables/instanceVersion.ts
index 1cf87f3f3..154033266 100644
--- a/xmcl-keystone-ui/src/composables/instanceVersion.ts
+++ b/xmcl-keystone-ui/src/composables/instanceVersion.ts
@@ -30,19 +30,31 @@ export function isResolvedVersion(v?: InstanceResolveVersion): v is ResolvedVers
 
 export function useInstanceVersion(instance: Ref<Instance>, local: Ref<LocalVersionHeader[]>) {
   const { resolveLocalVersion } = useService(VersionServiceKey)
-  const versionHeader = computed(() => getResolvedVersion(local.value,
-    instance.value.version,
-    instance.value.runtime.minecraft,
-    instance.value.runtime.forge,
-    instance.value.runtime.neoForged,
-    instance.value.runtime.fabricLoader,
-    instance.value.runtime.optifine,
-    instance.value.runtime.quiltLoader,
-    instance.value.runtime.labyMod) || { ...EMPTY_VERSION, id: getExpectVersion(instance.value.runtime) })
-  const folder = computed(() => versionHeader.value?.id || 'unknown')
+  const versionHeader = computed(() => {
+    let result: LocalVersionHeader | undefined
+    if (instance.value.path) {
+      result = getResolvedVersion(local.value,
+        instance.value.version,
+        instance.value.runtime.minecraft,
+        instance.value.runtime.forge,
+        instance.value.runtime.neoForged,
+        instance.value.runtime.fabricLoader,
+        instance.value.runtime.optifine,
+        instance.value.runtime.quiltLoader,
+        instance.value.runtime.labyMod)
+    }
+    if (!result) {
+      result = { ...EMPTY_VERSION, id: getExpectVersion(instance.value.runtime) }
+    }
+    return result
+  })
+  const folder = computed(() => versionHeader.value.id)
 
   const { isValidating, mutate, data: resolvedVersion, error } = useSWRV(() => instance.value.path && `/instance/${instance.value.path}/version`, async () => {
     console.log('update instance version')
+    if (!instance.value.path) {
+      return undefined
+    }
     if (!versionHeader.value.path) {
       return { requirements: { ...instance.value.runtime } }
     }
diff --git a/xmcl-keystone-ui/src/composables/instances.ts b/xmcl-keystone-ui/src/composables/instances.ts
index 21d466cfc..bb163ee9d 100644
--- a/xmcl-keystone-ui/src/composables/instances.ts
+++ b/xmcl-keystone-ui/src/composables/instances.ts
@@ -12,8 +12,7 @@ export const kInstances: InjectionKey<ReturnType<typeof useInstances>> = Symbol(
  * Hook of a view of all instances & some deletion/selection functions
  */
 export function useInstances() {
-  const path = useLocalStorageCacheStringValue('selectedInstancePath', '' as string)
-  const { createInstance, getSharedInstancesState, editInstance, deleteInstance } = useService(InstanceServiceKey)
+  const { createInstance, getSharedInstancesState, editInstance, deleteInstance, validateInstancePath } = useService(InstanceServiceKey)
   const { state, isValidating, error } = useState(getSharedInstancesState, class extends InstanceState {
     override instanceEdit(settings: DeepPartial<InstanceSchema> & { path: string }) {
       const inst = this.instances.find(i => i.path === (settings.path))!
@@ -46,6 +45,8 @@ export function useInstances() {
   })
   const _instances = computed(() => state.value?.instances ?? [])
   const { instances, setToPrevious } = useSortedInstance(_instances)
+  const _path = useLocalStorageCacheStringValue('selectedInstancePath', '' as string)
+  const path = ref('')
 
   async function edit(options: EditInstanceOptions & { instancePath: string }) {
     await editInstance(options)
@@ -65,21 +66,47 @@ export function useInstances() {
       }
     }
   }
-  watch(state, async () => {
-    let firstInstancePath = instances.value[0]?.path ?? ''
-    if (!firstInstancePath) {
-      firstInstancePath = await createInstance({
-        name: 'Minecraft',
-      })
-      path.value = firstInstancePath
-    }
-    const existed = instances.value.find(i => i.path === path.value)
-    if (!path.value || !existed) {
-      // Select the first instance
-      path.value = firstInstancePath
+  watch(state, async (newVal, oldVal) => {
+    if (!newVal) return
+    debugger
+    if (!oldVal) {
+      // initialize
+      const instances = [...newVal.instances]
+      const lastSelectedPath = _path.value
+
+      const selectDefault = async () => {
+        // Select the first instance
+        let defaultPath = instances[0]?.path as string | undefined
+        if (!defaultPath) {
+          // Create a default instance
+          defaultPath = await createInstance({
+            name: 'Minecraft',
+          })
+        }
+        _path.value = defaultPath
+      }
+
+      if (lastSelectedPath) {
+        // Validate the last selected path
+        if (!instances.some(i => i.path === lastSelectedPath)) {
+          const badInstance = await validateInstancePath(lastSelectedPath)
+          if (badInstance) {
+            await selectDefault()
+          }
+        }
+      } else {
+        // No selected, try to select the first instance
+        await selectDefault()
+      }
+
+      path.value = _path.value
     }
   })
   watch(path, (newPath) => {
+    if (newPath !== _path.value) {
+      // save to local storage
+      _path.value = newPath
+    }
     editInstance({
       instancePath: newPath,
       lastAccessDate: Date.now(),
diff --git a/xmcl-keystone-ui/src/composables/launchTask.ts b/xmcl-keystone-ui/src/composables/launchTask.ts
index cf74c7a43..1a197a066 100644
--- a/xmcl-keystone-ui/src/composables/launchTask.ts
+++ b/xmcl-keystone-ui/src/composables/launchTask.ts
@@ -6,6 +6,7 @@ export const kLaunchTask: InjectionKey<ReturnType<typeof useLaunchTask>> = Symbo
 
 export function useLaunchTask(path: Ref<string>, version: Ref<Instance['runtime']>, localVersion: Ref<LocalVersionHeader>) {
   return useTask((i) => {
+    if (!path.value) return false
     const p = i.param as any
     if (i.state === TaskState.Cancelled || i.state === TaskState.Succeed || i.state === TaskState.Failed) {
       return false
diff --git a/xmcl-keystone-ui/src/composables/save.ts b/xmcl-keystone-ui/src/composables/save.ts
index 7c90d1da9..fb6d31945 100644
--- a/xmcl-keystone-ui/src/composables/save.ts
+++ b/xmcl-keystone-ui/src/composables/save.ts
@@ -5,9 +5,9 @@ import { useState } from './syncableState'
 
 export const kInstanceSave: InjectionKey<ReturnType<typeof useInstanceSaves>> = Symbol('InstanceSave')
 
-export function useInstanceSaves(instance: Ref<Instance>) {
+export function useInstanceSaves(instancePath: Ref<string>) {
   const { watch } = useService(InstanceSavesServiceKey)
-  const { state, isValidating, error } = useState(() => instance.value.path ? watch(instance.value.path) : undefined, Saves)
+  const { state, isValidating, error } = useState(() => instancePath.value ? watch(instancePath.value) : undefined, Saves)
 
   const saves = computed(() => state.value?.saves || [])
 
diff --git a/xmcl-keystone-ui/src/windows/main/Context.ts b/xmcl-keystone-ui/src/windows/main/Context.ts
index f4bbf9241..fff3fa3c1 100644
--- a/xmcl-keystone-ui/src/windows/main/Context.ts
+++ b/xmcl-keystone-ui/src/windows/main/Context.ts
@@ -66,8 +66,8 @@ export default defineComponent({
     const instanceVersion = useInstanceVersion(instance.instance, localVersions.versions)
     const instanceJava = useInstanceJava(instance.instance, instanceVersion.resolvedVersion, java.all)
     const instanceDefaultSource = useInstanceDefaultSource(instance.path)
-    const options = useInstanceOptions(instance.instance)
-    const saves = useInstanceSaves(instance.instance)
+    const options = useInstanceOptions(instance.path)
+    const saves = useInstanceSaves(instance.path)
     const resourcePacks = useInstanceResourcePacks(instance.path, options.gameOptions)
     const instanceMods = useInstanceMods(instance.path, instance.runtime, instanceJava.java)
     const shaderPacks = useInstanceShaderPacks(instance.path, instance.runtime, instanceMods.mods, options.gameOptions)
diff --git a/xmcl-runtime-api/src/services/InstanceService.ts b/xmcl-runtime-api/src/services/InstanceService.ts
index f42d789b5..e4627f573 100644
--- a/xmcl-runtime-api/src/services/InstanceService.ts
+++ b/xmcl-runtime-api/src/services/InstanceService.ts
@@ -188,6 +188,8 @@ export interface InstanceService {
    * @returns The instance path
    */
   acquireInstanceById(id: string): Promise<string>
+
+  validateInstancePath(path: string): Promise<'bad' | 'nondictionary' | 'noperm' | 'exists' | undefined>
 }
 
 export const InstanceServiceKey: ServiceKey<InstanceService> = 'InstanceService'
diff --git a/xmcl-runtime/instance/InstanceService.ts b/xmcl-runtime/instance/InstanceService.ts
index 650ce48d7..b4577d18e 100644
--- a/xmcl-runtime/instance/InstanceService.ts
+++ b/xmcl-runtime/instance/InstanceService.ts
@@ -661,4 +661,15 @@ export class InstanceService extends StatefulService<InstanceState> implements I
     this.log(`Create new instance ${id} -> ${instancePath}`)
     return path
   }
+
+  async validateInstancePath(path: string) {
+    const err = await validateDirectory(this.app.platform, path)
+    if (err && err !== 'exists') {
+      return err
+    }
+    if (this.state.all[path]) {
+      return undefined
+    }
+    return await this.loadInstance(path).catch(() => 'bad') ? undefined : 'bad'
+  }
 }
diff --git a/xmcl-runtime/util/validate.ts b/xmcl-runtime/util/validate.ts
index 9bcd078f3..d48bd857e 100644
--- a/xmcl-runtime/util/validate.ts
+++ b/xmcl-runtime/util/validate.ts
@@ -1,8 +1,8 @@
+import { Platform } from '@xmcl/runtime-api'
 import { randomBytes } from 'crypto'
-import { mkdir, readdir, stat, unlink, writeFile } from 'fs/promises'
+import { mkdir, readdir, rmdir, stat, unlink, writeFile } from 'fs/promises'
 import { join } from 'path'
 import { isSystemError } from '../util/error'
-import { Platform } from '@xmcl/runtime-api'
 
 export async function validateDirectory(platform: Platform, path: string) {
   // Check if the path is the root of the drive
@@ -38,7 +38,7 @@ export async function validateDirectory(platform: Platform, path: string) {
     // Check if we have permission to create the directory
     try {
       await mkdir(path, { recursive: true })
-      await unlink(path)
+      await rmdir(path)
     } catch (e) {
       if (isSystemError(e)) {
         if (e.code === 'EACCES') {