THANK YOU, THANK YOU, THANK YOU, THANK YOU, THANK YOU!!!
What a relief to have it back to normal! First step now: full Reg backup!!
Edit: PS: Apparently, it didn't. Thankfully!
Edit2:
Whoops! I may have spoken too soon.. I see the original Batch did the same thing for (I think) 5 different templates of folders.. My root D: drive and root C: drive are back to normal, but it looks like all other folders still have only the edited styles, with "Extended Tile" view. I'll restart and see about it..
Edit3: (final edit)
clifford_cooley's solution worked partially, but I was able to find out that the Batch file adds to a few specific folders/branches in the Registry:
HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Bags
HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\BagMRU
HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags
HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU
By deleting the contents of these 4 folders (more simply by deleting the folders themselves), and then logging-off, and back in again, the Folder views were all reset to default! Everything is back to normal!