I updated to 3.0.21 which fixed the problem with DMX channel selection, however an issue with some song tracks not playing has shown up. The problem is not on all tracks or all songs. Seems to be completely random; except that if a track on a particular song does not play, it consistently does not play, even after restarting VST and restarting my system.
Reinstalled version 3.0.20 and all songs and tracks play properly.
I didnt try 3.0.19. yes all the audios must be converted to 48khz or must have strict similar sample rate. If you are using 44khz then you need to select 44khz in vst live hub settings.
This is not how VSTL works. VSTL does realtime sample rate conversion. No need to change normally, but latest versions have some problems with it that you can see in the other threads. Converting to 48 all audio is a stop gap measurement for latest versions.