how do i update my game version? thank you
It's a bit late so maybe you have solved this already but personally I use the Itch launcher (downloadable from the itch.io front page, the button says "download app") which works like a scaled down Steam and asks if you want to update before launching.
If you feel that you already have way too many launchers I think you have to redownload the updated game, which you can do from your library page on itch.io (via the arrow next to your profile name in the top right corner). There might be a more elegant solution but I'm onestly not that familiar with this site.