The miracle cure arrived and his name is kxtvet.
I was reluctant to do the system reset trick since the thought of manually reconfiguring the KSU again was a bit overwhelming. But, this morning kxtvet helped me get the DOS software, which was the silver bullet I needed.
I used my XP netbook and USB com port dongle, saved the crippled XK-TD816's data, performed a fresh system reset, then reloaded the database. Long story short, problem solved.
It's a mystery why the MWL issue occurred in the first place. But, the solution was as painless as I could have ever hoped for.
Thanks to all that lent me a hand. I appreciate the kindness.
- Thomas