Sorry, I can't remember that far back :-)
What I can remember...
If there's an option to regen instead of rebuild, use the regen instead.
It should only update what your current cutter paths and tool selections without getting new info from the database. I think there is a checkbox to click that says don't ask again this session, it may work...or not.
2003...wow...not buggy? I remember versions before 2006EX use to crash just by right clicking too quickly in the operations tree. Then other times you would click a feature and it would freeze the system for a while...come back and crash. The only work the software was getting done was sending error reports.