I had something similar with my DVDSP.
Called Apple and they did help me solve the problem without receiving a new disk.
It is a different program but you can try what they had me to.
Go under a different user name in my case had to created a different user in the system.
Then checked to see if DVDSP would run fine under that new user.
It did so they narrowed it down to my preferences. Had me return back to my user name, threw that preferences in the trash and poof I was back up and running fine.
I remember a few versions back that was a common thing to throw your prefs in the trash.
Might want to give it a shot.
Hope that helps
GL
SL8UP