Windows 7 has implemented addition security mechanism to prevent accidental or intentional file or folder modification by not allowing users other then owner of file or folder to access it.
Due to this, and depending of your Windows 7 settings, the T3Desk Apps module fails sometimes to create and modify the necessary database in T3Desk installation folder. This is not happens on Windows XP.
While we are working to fix this in the upcoming minor version (by moving the Apps module database to Libraries / Documents location), there is a workaround to fix this issue by settings. You can find the step by step information here in this article ... We hope to have this issue fixed as soon as possible for our users.
This problem is now fixed in T3Desk 2 - Build 13.03.