Creo Simulation Live - product trial questions

I had a couple pieces of feedback from a couple of our users that were using this:

• We had a couple reports that doing a Ctrl+Z (Undo) crashed the system, thus needing to close out of Creo and restart it.
  • More curious if anyone else has experienced this?
• Loads or fixed locations attached to patterns were fairly unstable
  • Any change to pattern caused all but the 1st hole to lose its reference, not just the holes that changed
• Would be nice to have the ability to LOCK the legend color scale
  • This would make tracking progress with changes made to the design easier.
  • If say "Red" means the same thing between changes then if the amount of red decreases, we are getting better without having to read what the new values are.