To prevent that, I copy all of my Quake data and make a seperate folder for every engine I use. For example, when I use Quakespasm and then try to use another engine, the console informs me that a lot of CCMDs and CVARs are invalid, the resolution gets reset from 1920x1080 fullscreen to 640x480 windowed and nothing is rendered apart from a gray screen. While SQL is able to detect and support multiple engines, having more than one engine in your Quake folder is not advised, because they can conflict in the DLLs they use and also in how they read and write to the config.cfg in ID1 and mod folders. Apart from that I think that everything works as intended.
Also, moving/dragging the launcher via the mouse causes it to jitter/lag, at least it looks not as smooth as moving any other window on Windows 7. Trying to launch a game afterwards causes it to crash, and trying to exit it causes it to turn black and freeze.
It could just be on my end, but SQL doesn't let me enter anything into the blue boxes in the command line, it stops after one character.
