Do you have a domain? If you do, maybe try Nginx Proxy Manager and SFTPGo. I previously used File Browser but the developers made some fairly large breaking changes and I never went back. SFTPGo lets you add accounts easily and I have specific folder setup for sharing with friends. It has a clean interface too. If you don’t have a domain, maybe try Tailscale?

This is really disappointing, but not unexpected. I’ve been using Nova for more than a decade and can’t get used to any other launcher I’ve tried so far. Everyone thought Nova would turn into an ad infested shell of itself once it was bought a few years ago. I guess this is worse since it will cease to function soon (maybe).