I'm also having the same issue running 3.01.0. HX Stomp was working fine using multiple snapshots per preset before the update. Tried to go back to 2.9 and 2.8 and the problem never got fixed. Once it locks up, nothing works and it disconnects from the HX Edit.
FWIW my HX Stomp also gets locked up on the loading screen probably 3 out of 5 times. I have to restart it, manually until it pushes through to the main screen.
Anyone have any ideas?