There are some breaking changes in DNN 4.3 that make it impossible to have a fully functional DMX 3.4.4 run on this. We are working on a solution. It seems that we can no longer avoid a 'fork' in the code, i.e. a version for DNN 3 and a version for DNN 4. I would advise to hold off on upgrading to 4.3.1 if you're running DMX for now.
Kind regards,
Peter Donker
Bring2mind