scook
To access the ACT learn button on a BitBridged VST, hold the SHIFT key when opening the plug-in UI. The VST header with the ACT learn button will open in a second window usually behind the plug-in UI.
Another addition to the list of things I didn't know :-)
Does that show the other 'missing' buttons too, like solo, mute, read/write enable etc?
Cheers!