When you have something like:
--> A.Folder.With.Dots.In.It's.Name
There is no match unless "[x] E" extension for the file is enabled.Rename Mask: [N]
Ext: [E]
[x] Regexp
Find: ^A.Folder.With.Dots.In.It's.Name$
Replace: <Blank>
As everything after the second period/dot is considered a file extension.
This doesn't even match CMD-line/batch rules, wherein the extension would be ".Name"
I would think that within the MRT folders should either:
1) Not have an extension at all, or
2) At least match CMD-line rules and the text after the last period would be the extension...
NOT all of the text/characters after the 2nd period.