Update lutris from a distro store version

So I’ve installed lutris from the distro I’m using (Linux Mint 22.3) and got all my games running, and find that because the version from the distro store is old (5.14 something, vs. 5.22 something as of this writing), I can’t sync with itch.io. So I’d like to upgrade to the latest version, but all the reports I read mirror my experience that the lutris ppa can’t be added. So no chance to use “apt update”.

How can I best update without losing all my work? I don’t want to open a copy of lutris that doesn’t know about any of my games and have to manually add them and edit configuration files, or even worse redownload everything just to get the installer to set up the new lutris.

Thanks for general suggestions; I’ll google around after that if necessary.