I just upgraded the app from v23.6.3 to v25.4.0. The games that I have installed and are shown within the old app now don't show up anymore. Oddly, I also can't import them when I tell the app the directory where the games are installed.
Also, is there any way of adding (free) games to my library that I installed with the app? A tickbox of "Do you want to add this game to your library?" would suffice. I don't know why this still isn't implemented, but maybe I don't see it. Any help is appreciated!