all sonar templates are corrupted?

Hi,
I just reinstalled sonar, because (I think mostly because of things I did...) it went all whacked. When I got it reinstalled, any track template I try to open including the AAA templates, normal, and anything but blank, says it may be corrupted, or isn't compatible with this version of sonar... and to try holding down shift when opening it. Any idea what could have happened?
Thanks,
-Michael.