Sigh... I'm really getting to the end of my tether now. I received an email on Tuesday from TravisG (tech support), suggesting I uninstall and reinstall everything, and verify everything by using odnt_zapper, which he gave me a link for. I did this, and after ensuring there was nothing left, I reinstalled SDC, DX, WB, IP, and TM, rebooted and tried to load one of the troublesome DX themes. Same problem, only now I seem to have inherited the "black menu = you're a thief" problem. How the hell did that happen?!? Since buying this software on 20-5-06, I'd never had that problem, but now, since uninstalling and reinstalling; I do. ...or rather, did...
I decided to uninstall the whole damn thing, again, and also, after running the zapper, I gutted every single reference of the software(s) from the registry, and I do mean everything. It took me over an hour, and there were a staggering number of entries left in there, even after a complete uninstall. Anyway, after having done this, I re-booted, and re-downloaded everything again, reinstalled SDC, DX, WB, IP, and TM, and tried again. Yup, you guessed it - "Stardock MCP not found or wrong version. Systray support disabled." Also, the three culprit files are still absent from my system.
I'm afraid my patience reserves are running low.