I think that would be all before 5.2 but I please keep in mind that there were some nasty GDI object leaks and some cross threading issues with bitmaps in 5.1.x and 5.0.x. Depending on how you use Royal TS, those versions may be unstable.
"That's why we are considering a "initial scale factor" setting so that users can set it to whatever they prefer."
Thanks for keeping this thread alive and this would be great just like the webpage zoom factor!
For now I've just been using my laptop at 100% DPI so scaling is normal in RDP sessions, it's a little harder on the eyes but makes work so much easier.