OK, this is what I thought...either one. But, I believe that this one, was the one that problem were arising in. Nonetheless, I will now try a little experiment: Disable one of the folders and see what happens; and, then, disable the other one, and see what happens. A rather simple approach, just hope I don't screw things up. Will let you know what happens by tomorrow.
Well, I don't think I need to go into all the hairy details, but I spent over 2 hours disabling/enabling the two NIK plugins. And then testing each of the enabled NIKs by 1) Calling images from PSE, exporting from Photolab, exporting from Faststone and then 2) Testing each instance with NIK, there were many randon errors with Define 2 and RAW preprocessing...sometimes they worked, other times not, with each one having the same error alert indicating a disk error. I knew that there probably was some kind of corruption going on, but as things mostly worked and I wasn't sure how to go about starting over. I didn't do anything. But, then I thought what the hell, in one of the plugins there was an .exe to delete NIK...so, I took a chance an executed it. Lo and behold, all signs of the installed NIKs were deleted. I then re-installed a new free NIK (v 1.2.11), tested as before (1 and 2,) and now is all working as it should and the plugin folder looks just like yours. Thanks loads for your support.