Did you try to save a v3 preset within the plugins preset mechanism and load it with v4?
Yes, doesn’t work. They changed big things like the second layer. So it’s really not possible.
Tomorrow I will check how many plug ins or sounds are effected and than I will decide what to do.
Programm them new if it’s not so much, go on with Rosetta or stay on GP4 with Rosetta and take the time for program new in GP5…
I think one or three is the best for the future although it’s not so cool.