Visual Studio Version 10?

Trying to use msbuild in FinalBuilder v.6.3.0.2026, it complains about only being able to use msbuild on Visual Studio versions 7 through 9.

Anything I can do about Visual Studio solution files that are version 10?

You need to select the correct dot net framework version, .net frameworks earlier than 4.0 don’t know about VS 10 solutions.