buddyowens

Thanks! You are correct--I had chosen a preset which was hitting DSP pretty hard. When I changed to a 'lighter' preset, the amps appeared. As I'm not a 'performing' musician, but working in a home studio changing the Hardwared Compatibility Mode in Helix Native also eliminated the issue. I much appreciate your timely and accurate response. Thanks, again.

After doing 3.80 updates for both HX Edit and Helix Native (including 3.81 update for HX Edit on Mac Silicon), all is well with HX Edit. All instructions were followed, and LT firmware was also updated without issue. But in Helix Native, 3 Amps are greyed-out: Panama Red (Blue is not, and works), PV VitriolCrunch and PV VitriolLead. All others new amps are present and functional. Please advise.