Suggesting that ebook-edit.exe and ebook-viewer.exe be relocated from "calibrePortable > App > Calibre" (else duplicated) to "calibrePortable". They're technically standalone applications, and the official portable has them in the root app directory to that effect. I utilize both for eBooks that aren't in the main/library program at all and would like to be able to do so with PAF as well, which presently isn't possible from directly within the launcher as they're both in subfolders.
Why? I find it's much preferable to create/modify eBooks that way as opposed to variations of them cluttering up the main/library app and having to launch either from there.