Project can't find Dim Pro after upgrading to Win 7 64-bit

Hello,

I recently upgraded to Win 7 64-bit. I reinstalled Sonar 64-bit without any issues. Projects open fine as well. The only problem is that Dimension Pro can't be found by the project, so those tracks become disabled. Dim Pro is installed. How can I fix this without having to start a new instance? Registry tweak?

Thanks :)