What version of Clips should I use - Clips 6.4Beta or 6.31? Are there any problems with the Beta version?
You can use either. Version 6.4 Beta is stable, I've just been slow in packaging the final release version. If you're embedding CLIPS within another program, you'll want to use 6.4 as the APIs have been redesigned. The 6.4 Windows IDE now supports unicode, so you'll want to use that if your program needs to display unicode characters.