I was just looking over the source code that I was modding that came from Notepad++ and noticed that this line of code made no sense:
Delete "$INSTDIR\App\DefaultData\whatever folders after\”
I put the whatever folders thing but I was under the impression that nsis would compile this as “Take the files from "$INSTDIR\App\DefaultData\whatever folders after” and install them in the same place on the portable” at least when the installer was being created, but then I noticed the Delete in front of it and was wondering what that does, does it actually delete the files that are in the following directory or what?