[Cue Zephyr]

I think I saved it into one of the five available presets, so whenever I pressed the preset button I got a clean amp with a rack compressor. But I agree, the editor isn't that user-friendly.

I don't have the THR editor ready, but from the settings listed I can't tell right away how the numbers work on attack and release. You can try different knee settings. Knee is how hard the compression kicks in. Hard means it compresses directly past the threshold. Soft means there's a slope of a few dB past the threshold making the transition from uncompressed to compressed a little more subtle.

Compressors are difficult to include in presets because the makers don't know what guitar you're playing and how much output it has. That's the problem I had with storing it in a preset because I have multiple guitars with different pickups and output levels.