Installing VSTO 4.0 Causes VSTO 3.0 Addin to quit working
- by Jacob Adams
I just installed Visual Studio 2010 yesterday. As part of that I installed VSTO 4.0. Now when I run any Office application, my VSTO 3.0 addins fail to load. The error in the event log is
Customization URI: file:///H:/PathToMyAddin/MyAddin.vsto
Exception: Customization does not have the permissions required to create an application domain.
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