Excel won't open/launch VSTO AddIn when running in debug mode of Visual Studio 2010

Question

I had previously installed the VS11 beta, and had some issues with my Visual Studio 2010 instance, which you can see here how they were resolved: Excel AddIn Click Once depl

Answer 1

I had the same problem in Excel.

The following worked for me:

Go to the following key....

HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Excel\AddInLoadTimes

see if your plug-in is listed. if so, delete it.

now run your app from Visual studio again.

This worked for me, hope it can help someone else.