Upgrading Solution

I just purchased Visual Studio 2012 and it is working fine, except in order to open my solution on my Development computer, I had to find the .sln file in my 2008 Projects folder.  That is fine, and it opens and converts the code, but if I exit Visual Studio, the next time I open, it does not show on the opening page under "Recent" and I go find it in the 2008 folder again.  Then it does the convert again.  Any ideas what I need to do to make this be in the 2012 Projext folder and to save it so it doesn't convert every time it's opened?

THANKS! 

Wes