It says I am using the 16.0.4.124 version of Movie Edit Pro Plus (copyright 2017). I was having some glitches a few months ago, so I checked for and installed updates. The original problems went away, but ever since I did the updates, now the "undo" function doesn't work right (which was not an issue before). When I click the undo button the whole program freezes up for a minute or more before finally undoing the last action. I was hoping this problem would gradually go away, but it hasn't. I have gotten used to working around it and trying to not use the undo function very much, but this is frustrating. Does anyone know the solution to this problem?