VS2008 Express no longer opens projects after VS2010 express Phone

So I installed the new april release of the VS2010 express for windows phone 7 and now VS2008 express C# no longer opens .csproj files. I'm at a loss as to why this is as I've not changed anything in the files themselves. I'm currently uninstalling windows phone 7 in the hopes that I will be able to open my files again. I have a feeling though I'm going to need to uninstall 2008 as well an开发者_StackOverflow中文版d the reinstall it to get everything to work.

In the future how should I install 2010 express for win 7 phone to prevent it from interfering with 2008 express?

You can change file associations without reinstalling apps. If you open Visual Studio 2008, go Tools->Options, there should be a button somewhere to "Restore file associations".