True Pianos (full version) 1.9.3 suddenly ask for registration code / new 1.9.4 available

Anyone experiencing True Pianos full version suddenly ask for registration code (after operating for a long time, and also didn't use it for some time) ? After entering the code, it asked again next day.

So I decided to contact support, only to discover there is newer version 1.9.4 available, updated, registered again, and so far it operates fine.

Not a real problem now, perhaps just an update for those not realizing there is a newer maintenance release.