I just purchased and downloaded the full version of Sonar Platinum.  I have a couple of old song files that I try to load, but Sonar freezes up and I get a 'sonarplt.exe has stopped working".
 
The odd thing is that the files open perfectly in Music Creator.  Any suggestions?
 
Thanks

Not on Platinum yet. Not a Music Creator user either, but if you can open Music Creator files in Sonar, you can try to find the problem by copying the original project into a new test project, then remove a track at a time using Music Creator and reopen it with Platinum to find the issue.