Hmmm... I missed the FP.customTitle property node. So here is a better implementation of the previous vi : the VI name is not duplicated. The fp window name appears now as [8.6] [vi name] when there is no custom fp name. Clean enough ? May be...
Changing the actual VI name, while possible, is not an option, since application behavior may depend on the name. So I don't see any way to improve the result.
Chilly Charly (aka CC)