It looks like the new Music Maker 2023 is out. The update is free if you don't care for the new features like Beatbox 2 and the modernEQ plugin.

It looks like Magix dropped its old Magix Low Latency ASIO driver and replaced it by a new Music Maker ASIO driver.

The MIDI editor was also reworked.

I hope this solves some problems many users had in the past. I wasn't able to test it very thourogly so I don't know how buggy it is. I hope it doesn't have too many bugs. 😉