When opening TH3 today, I got a message asking if I wanted to download the new version 3.1.6 of TH3. This is for the "FULL" TH3 which I purchased a couple months ago. I can't get Midi Prog changes to work in SONAR with this new version but the standalone works fine. I didn't have this problem with the prior 3.0.5 version.
Things I tried - after installing new version, I first did a rescan of VST plugins and now TH3 shows up as a VST3 audio effects plugin (In prior 3.0.5 version it was just VST). I have a template track consisting of an audio track with TH3 inserted in the effects bin and a 2nd track that's Midi and is set to control TH3. I've tried creating the 2 tracks from scratch, checked TH3 has "Enable Midi input" checked in plugin header. After none of that worked, I tried configuring TH3 as instrument and effect and that doesn't work. Can't get any program changes to work. Wish I'd held off on installing new version.