v6.4.1

• Position and Rotation weights for controllers (shows up as two additional storables per controller, additive to the ones in the Parent & More panel)
• Allow deleting / cutting trigger keyframes at frame zero
• When trying to save an animation that has broken references, save the previous values instead of crashing
• Fix rotation controller panel showing the position target edit screen instead
• When importing shared animations only in an empty instance, keep Anim 1 to avoid crashes
• Fix crash when toggling loop in imported animations