Everything was working great and my Visual Studio 2010 Beta 2 stopped starting. I tried to reinstall VS2010B2 and that did not fix the problem. I just got this stupid error:
The application cannot start.
Some google searches turned up Weston Hutchins blog on the issue. I tried several of the steps and noted this difference on my system.
He says that your personal settings files are stored here:
%USERPROFILE%\Documents\Visual Studio 2010\Settings
I actually found them in:
%USERPROFILE%\Documents\Visual Studio 10\Settings
Weird. So I blew them away and restarted. Got the same error. So this tells me there is more to it than just the settings files. There must be a settings file elsewhere that is the culprit. So I moved on to the next step that actually worked for me.
Load the Visual Studio 2010 Beta 2 command prompt and type: devenv /resetuserdata
Viola! This worked and I got the following screen:
After this I got the screen asking you how you want the development environment to be configured and it sets up the IDE in the default manner. But everything is working great now!