I'm a left handed mouse user (not by choice).
It's easy to swap mouse buttons in Windows, but this is unfortunately not applied to remote desktops.
It would be a great feature in royal-ts if you could somehow swap mouse buttons for all connections, so you didn't have to configure it on each server.
since we are using Microsoft's RDP ActiveX control (which ships with Windows), we cannot really change the behavior. Microsoft needs to implement this feature, so that we can make use of it. Sorry I have no better news for you.