Why not use the “Install a Windows game from an executable” option in that same + menu?
Side note though, this would make games downloaded from SteamRIP easier to install under lutris for me, as they aren’t installers, and I’ve been using bottles to generate the prefix for me.
I’ll +1 their comment that it’s super newbie friendly, it’s the distro that finally got me to switch fulltime from Windows. It works well with NVIDIA, and you have the choice between KDE Plasma or GNOME when you download it :)