Just went through this myself. The best fix I could find was to open live and simply right click on the plugin in the browser and uncheck “Auto Scale Plugin Window.” This allowed me to keep running the rest of my plugins in hidpi. There is a new setting in Live 10 where you can check and uncheck hidpi in the preferences menu, and although unchecking it will solve the issue, it means everything won’t look as good. Unchecking “Auto Scale” on each soundtoys plugin individually works better and you only need to do it once for the program to save the settings.