Tomdroid 0.7.1 Crash on Revert

In Settings, Service is on "SD Card".

Steps to reproduce are:
1) LongClick on "Tomdroid's First Note"
2) Click on "Revert"
3) Click on "Yes"

The obtained exception stacktrace is reported below:

E/AndroidRuntime( 836): FATAL EXCEPTION: main
E/AndroidRuntime( 836): android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@405148b0 is not valid; is your activity running?
E/AndroidRuntime( 836): at android.view.ViewRoot.setView(ViewRoot.java:527)
E/AndroidRuntime( 836): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
E/AndroidRuntime( 836): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
E/AndroidRuntime( 836): at android.view.Window$LocalWindowManager.addView(Window.java:424)
E/AndroidRuntime( 836): at android.app.Dialog.show(Dialog.java:241)
E/AndroidRuntime( 836): at android.app.Activity.showDialog(Activity.java:2566)
E/AndroidRuntime( 836): at android.app.Activity.showDialog(Activity.java:2524)
E/AndroidRuntime( 836): at org.tomdroid.ui.Tomdroid$SyncMessageHandler.handleMessage(Tomdroid.java:922)
E/AndroidRuntime( 836): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 836): at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime( 836): at android.app.ActivityThread.main(ActivityThread.java:3683)
E/AndroidRuntime( 836): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 836): at java.lang.reflect.Method.invoke(Method.java:507)
E/AndroidRuntime( 836): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
E/AndroidRuntime( 836): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
E/AndroidRuntime( 836): at dalvik.system.NativeStart.main(Native Method)
V/SyncService( 836): sync progress: 80
V/SyncService( 836): sync progress: 90
W/ActivityManager( 68): Force finishing activity org.tomdroid/.ui.Tomdroid