I realize that this is a little premature in that you haven't released it yet, but InkscapePortable 0.92.3 leaves a fontconfig folder in AppData — %appdata%\Local\fontconfig\cache which contains two files, CACHEDIR.TAG and d031bbba323fd9e5b47e0ee5a0353f11-i686.cache-7.
This is the portable version available on Inkscape's site ( https://inkscape.org/en/release/0.92.3/windows/32-bit/portable-app/dl/ ) which is in PAF format and was uploaded by Gord Caswell, so I assume it's the same one you will eventually be releasing.
This was first reported at https://www.portablefreeware.com/forums/viewtopic.php?t=3927&p=89398#p89398 . I confirmed that it happens on my computer (Win7 Pro SP1).
Visit the Community page
Join our forums
Subscribe to our email newsletter
Subscribe with RSS
Follow us on Facebook
Follow us on LinkedIn
Follow us on Twitter
Follow us on Mastodon
Follow us on BlueSky
Thanks for catching that. I've fixed it locally, and we'll upload a new build prior to the official release announcement by either Inkscape or PortableApps.com
This is fixed in Inkscape Portable 0.92.3
Sometimes, the impossible can become possible, if you're awesome!