Preps 5.2 OS 10.6.3

[Yooper prepress]

I reloaded my OS yesterday and now Preps crashes at launch every time. The same thing is happening with itunes. I am more concerned with Preps at this point. I have been running it successfully using OS 10.6.3 for about a month. For some reason after I reloaded the OS it will not launch.
Thank you

[SpNac]

Have you restored Preps from a Time Machine backup?
Try in this order:
- Repair permissions in your hard disk with Disk Utility.
- Delete the .pwd file into the Preps folder and .lock file if it was also. Open Preps and generate a new .pwd file with the license information.
- Install a new version more compatible with your system. Preps 5.3.1 is compatible with Leopard.

Nacho