I know what you mean. Ran into the same problem on the "old" 109E4. I just did a lot of work at one time before I exported it, then tested it. Of course, if you're fine tuning this doesn't help, as you need to export, go in, check, fix, repeat. But do as much as you can outside of the game then chcek it, that way you don't have to re-enter that transparency number so often.