I was on 4.0 waiting for 4.0.2, got busy and then in the meantime 4.0.3 was released. I got unbusy so tried to upgrade. I started XS, was prompted to upgrade, attempted to do so, but received some error messages about an inability to find the installation source. I should have grabbed a screenshot because now after an uninstall and reinstall I am getting different error messages.
I can install 4.0, I can upgrade to 4.0.3, but when I start Xamarin Studio I get the following message:
If I say Yes, XS loads but when I try to open a file it opens in Visual Studio instead. If I close XS and then start it again, I get a different message and XS fails to start at all after that:
Multiple uninstall attempts, installer repair attempts, and manually cleaning the registry seem to produce the same results.
Any ideas? This is on my Windows 8 system. On a Windows 7 box, everything worked correctly and it's running 4.0.3.