(2017-05-24, 4:43)Nathan S Wrote: Will I have to reinstall so that the software looks for a different "models" location so I can add sub-models, or can I change where MLCad looks for that file? I know I can change the library location in LDraw, but I don't know about Models.
Nowadays it's considered to be bad to use external sub-models. I believe that all the major CAD tools (including MLCad) support MPD files for sub-models, and this is the (highly) recommended way to go, as opposed to external sub-models. Having said that, I assume that MLCad uses the LDraw library's "models" directory for sub-models, so changing its LDraw library path should also change the path to the models directory to match.