STEPS TO REPRODUCE
1. Launch iClone 6
2. Apply a random G5 Non-Standard character (e.g. Gwynn)
3. Replace it to a random G6 Non-Standard character (e.g. Heidi)
4. Open Edit Motion Layer panel, select the Effector of Right Hand, adjust IK Settings
5. Click “Undo” on Toolbar

ACTUAL RESULT
Program crashes

EXPECTED RESULT
Program can work normally