By *uninstalling* the UXThemePatcher, rebooting, then re-installing it, rebooting again, and then setting Matte theme and Pro Tools dark mode, it now works as before, so that part is no longer a problem.
Here is screenshot with the debug version, still same issue, the "Make Borderless" and "Hide Title Bar" etc. commands make no change...
https://1drv.ms/u/s!ArqLAvH8ucCrlwLB...d8kk7?e=N0kWiM
