Yes! Thank you!
Now… As for running SMF as Administrator…
The ‘Mod Manager’ gives me an error about the path not being found.
Doing this with the ‘Deploy’ (tool?)… When I get into the game the only thing I get is the skip intro.
I’ll heed K_Rudd’s advice and download the “new” version.
I’ve (re)downloaded SMF from the Nexus website.
Question: Should I delete (almost) everything associated with the current SMF in its folder (as if doing a clean “install”)?
Answer: YES. And verify your game files in steam/epic before “reinstalling”.
Final Edit
I’m still too afraid to touch (e.g. deploy) FLV. I’ll still need to use piepie’s site and get that SDK thingy. So there’s still some potential to royally fuck things up (again). 
Again, sorry for the trouble, and Thanks for your patience.