I notice that the Compressor button is "greyed-out" after using DAX. I typically use DAX and DIGU with JT65/JT9 and recently used it with RMS Express/Winmor. I am using DAX on Channel 2 with Slice A. When I switch back to USB and turn DAX off, the COMP button cannot be activated. Shutting SmartSDR V1.1.3 down and restarting solves the problem.