My setting gone wrong and now scratch play is only White screen. Is anyone could tell me how to reset or delete the software setting. The Assimilate support refuse to help. May be someone know the tips?
Not sure Scratch support "refuses" to help you. They might have sent you to the PLAY group (which makes sense).
PLAY has a specific forum for support and sharing experiences: http://groups.google.com/group/scratch-play/topics
This being said, when you launch PLAY, go into Preferences/Configuration and deactivate all the variables you've set.