I noticed that some of my environment variables (VLSICKMACRO and VSLICKPATH) for some reason included my 21.0.0 config directory. (I'm running 24.0.0.8 now, and 23.0.x, 22.0.x, and other 21.0.x versions since 21.0.0.) I opened user.cfg.xml in SlickEdit and removed that directory, saved, exited SlickEdit, and restarted. And the paths were unchanged and the user.cfg.xml had the 21.0.0 directory back in it.
Should it be possible to edit SlickEdit environment variables by editing user.cfg.xml from SlickEdit itself? I'm just trying to follow the help which at least doesn't say that a separate editor must be used. I'd guess it would be normal to expect I could edit it with SlickEdit itself.