I'm experiencing the same problem. Reinstalling Visual Studio doesn't work either.
Can you offer the latest stable version on the download page? I need the update as soon as possible.
/edit
I assume it is not allowed that someone sends me the 3.50 setup?
Package Load Failure
Problem found. Look here for the hotfix:
http://crlab.com/forums/viewtopic.php?t=8485.
New build will be done in a while.
http://crlab.com/forums/viewtopic.php?t=8485.
New build will be done in a while.