I had Visual Studio 2015 RC installed and installed Visual Studio 2015 RTM over it. I couldn\'t find anything on the Internet that said you couldn\'t d
I also had a problem in Visual Studio 2015 RC.
There was a problem using menu File → New → Project... throwing an exception.
I followed the answer from Shittu Olugbenga, 2015-08-10, by deleting the content of folder: "C:\Users\\AppData\Local\Microsoft\VisualStudio\14.0\ComponentModelCache".
I restarted Visual Studio and it worked. :)