New Post: Excel Taskpane-Addin crashes Excel

Hi,

I successfully created a Taskpane for my Addin (no problem here, Taskpane shows up and displays it's assigned UserControl).
My problem is that whenever I try to access the Excel.Application (or the COMApplication) Excel stopps responding and crashes with no Errormessage or Exception.

I've already tried and simplified my Addin to contain only a one-button Taskpane which initially worked. But after a few, seemingly unrelated, changes (stupid me did not create a backup/check-in) it stopped working and shows aforementioned behaviour.

My best guess is i messed up the ProgId and COMAddin fields...

Thanks