+1 to all of this. I paid for it when it was $90 lifetime, before either Jellyfin was popular before I heard of it, who knows. It works fine. No reason to put extra effort into replacing something that I have no problems or qualms with.

Mint’s default file browser has a “connect” menu option that allows you to drag and drop like WinSCP - the only difference is you have to open a second window. You can even bookmark the remote connection. It probably supports SFTP, but I can’t check right now.