DWM-MX and new Mac 10.3.6

I've lost MX?! It was working fine, but after an OS upgrade I can't seem to
get it to start. I've done the permissions, threw out the old prefs...even
trashed the app and did a re-install on the internal HD. ....but it simply
won't go passed the spinning wheel and 15sec. of HD clicking. I can't enter
the ser#...or get it to do anything?! I'd certainly appreciate any
thoughts. Jim