If you get an unhandled exception error when running GetASFstream, you probably corrupted it somehow and you’re going to have to reinstall.
Not only do you have to reinstall, but make sure that you also delete the PREFETCH file from C:\WINDOWS\PREFETCH or else your problem will keep recurring.
That file’s name starts with: GETASFSTREAM2300C.EXE
Good luck!
Update 11/10/2010:
If it keeps giving you the unhandled exception error even after deleting the prefetch and reinstalling, then you may be able to get past this by clicking Debug and then exiting the debugger after it loads…it worked for me.