A bug-fix update has been uploaded for ArtRage 6.0.10

Solve a problem with serial number check issue on old version
Potential crash clicking off menu area - modal panels could cause a crash when invalid widgets processed a click.
Crash on deleting action after playing/recording other action. If an action was played, then another action deleted, there could be a lockup.
Undo buffer corruption on undo/redo of hiding/showing non-current layer.

It's not a long list, but the crash bugs were significant.