No plugins have user manuals. But Coremelt does have tutorials showing how to do stuff. Not to mention great tech support. If you don't see what you need in the video tutorials, email them. www.coremelt.com/tutorials.html
I've seen User Manuals for knives, hourglasses, shoelaces and even more'self explanatory' items.
Why no for plug-ins?
TrackX and SliceX are highly complex tools in a smart package, and I've mentioned the tutorials in my OP.
When I'm back from office, I'll illustrate my ignorance with some screenshots ...