Autosve doesn't work anymore

I just recognized after a critical shut down, that my Autosave Folder was completely empty.

I re-installed grasshopper and tested the diffrent options in the pref menu but still no AutoSave data was created.

The Appdata Folder is 'on' a windows junction. I run 3 diffrent PC that way and never had an Autosave issue with grasshopper.   

Any ideas anybody?

Windows 8.1

Rhino 5SR11

Grasshopper 0.9 Rev 14