Problem with this beta:
I installed firmware 11.00 beta and tried it out with a couple of presets. For the amp on channel A I selected basketweave to match the cab I had, then for the amp on channel B I selected greenback. This was for a BEC45 Friedman. No problems.
I saved the preset.
Then I did the same on the next preset for the HBE Friedman. (Both used the same templates with just the amp changed). I selected basketweave for amp A and greenback for amp B. I decided I like the null better for channel B so I then switched it from greenback back to null. There was a loud pop, then no sound at all.
I tried the previous preset I'd just worked on and it was the same. A pop and no sound at all.
I tried some other presets I hadn't touched. No sound.
I then deleted the two presets I'd just worked on and tried some other presets. No sound on anything.
So then I re-installed firmware 10.02 and everything worked fine again.
Luckily I'd backed up everything to Fractal Bot so I just re-installed the two presets I'd deleted.