I find its better to do some changes then save with a version number. If you do a save as Bryce will add a number on the filename for you. I have had situations when I have done a change and another change that screwed everything up. Nice to be able to step back. Also if you picture ends up somewhere that you don't want to go or you found a better idea, you can backtrack to a certain version without starting all over again. Truespace is a bit too buggy. Try messing with the extrusions and you get a dialog box behind the program. Seems like it is hung but no thats just a hidden dialog box. Click on scripts when you don't have one, boom instant crash to windows. If you don't have a script loaded, ignore the click or pop up a dialog saying "no script loaded". Don't just crash.