After rolling back to firmware 5.0.1, I still don't have SW Live Mode working at all in Cab Lab 4, but I was able to successfully use the HW Manual mode. Why anyone would want to use the HW Manual mode to create a blend of DynaCab Packs, or user IRs completely escapes me. The steps required to hear any edits made is a terrible workflow. Way too much trial & error, shooting in the dark, etc. Without a fully working SW Live Mode I can't imagine wanting to use the CL4 app.
Does anyone have Cab Lab 4 working in any way with fw 6 beta? That would be good to know, because if this is operator error, I haven't been able to find out what I'm doing wrong. Even with rereading the manual and revisiting several of the really great tutorial videos on Cab Lab 4.