undu/redu are not working

i have the world machine 2 professional and the undu and redu are not working.
is there a way to make them work?

Hi Edna,

Undo/Redo is not currently enabled due to some interactions that it encountered with a few devices during testing during the last Dev cycle. It just needs to be exhaustively tested and all corner cases fixed to be re-enabled, so it will hopefully make an appearance in a future update.