If everything is done logic wise and you're just updating the hard buttons, under properties uncheck the automatically build pages button.

But first, go to the interface you're having trouble with in VTPro. Once it is updated how you want it, click FILE then COMPILE. This will compile your interface right in VTPro. You're most likely having a failure upon compiling and it is reverting back to the last good interface. This is what my problem was with this exact issue last week.

Once it compiles, there is a little box at the bottom of the screen that will tell you if it was successful or if it failed.