Mave: as a quick fix you can try removing the line that actually does that check...
[FTP_Pre-Command_Events]
stor = TCL ..\scripts\nxTools\nxDupe.tcl PRESTOR
The only side effect besides not forcing sfv/nfo is it won't do dupe checking on filenames. I prefer my dupecheck on just dirnames so it wouldn't bother me, but you might...
I'm assuming this might be related to the new code that normalizes paths. Are there any symbolic links involved in the path?
That's my 2 cents
