Hi,
when you update Mach4, which would include installing an earlier build any files that have the same filename will be overwritten.
Thus if you use the file wx4.set, a screen set folder, that you have modified to do certain specific things. Now when you update
you will get a fresh wx4.set file, overwriting and losing all your edits/tweaks.
The trick to having Mach update WITHOUT losing all your work/settings/macros etc is to have unique and personalized names
for your profile AND YOUR SCREEN SET. Most people don't bother having a personalized screen set and the wonder what happened
to all their screen edits when they update. I know....that's how I found out!
Craig