Good to hear. Although not necessarily your problem, note that to have Hold Edges checked and Auto Align as well can cause some swimming as one setup tells RE:Flex to “go there” and the other to “come back”… the new update has a different behavior for Smart Blend (maintains a full alpha at the frame edges through the mix — blend 0 to 100% — if the two sources have full on alpha to start) and so is preferable probably then Hold Edges when doing Motion Morph.
Also to do both 4×4 and Smoothest Mip Map might be overdone and in the end uses incredible amounts of memory if you are not at least in Less Memory mode (vs Faster AA Method). 4×4 Anti-Aliasing + AA Method to Faster is probably a good way to kill your favorite app memory management (as it will then require 16X more memory about).
Pierre