Something I never fully understood with file versioning is on which side to apply it. The source or the receiving end?

Worth checking out Mealie, too. Can't say how it compares to Tandoor or Kitchenowl but I've been happy with Mealie for years now.

Actual Budget if you're more into envelope budgeting. I came from YNAB and could not get the same workflow out of Firefly as I could YNAB. Actual Budget does provide that.

I do think setting up HTTPS is required for Actual so if you don't have that yet, then Firefly is the way to go.

In Qbittorrent you can tell it to not download certain files. So you can tell it to ignore anything with *arj, for example.

I've had this happen with people pretending to be certain groups and making the file a .lnk (a link to a website, I assume). Sonarr will still send the file to Qbittorrent, but it won't get downloaded at all.