How do i get latest update if i bought the game?

If you are using your browser, you can just redownload the game to get the newest version. If you are using the itch.io app, the game should always be up to date. If not, you can try to reinstall the game. Don't worry, you don't have to rebuy it, because it's linked to your itch.io account.

But I installed the game and then i made a account will it be im my collection.

i already figured it out but tthank u anyway for helping me ive played since ancient warfare 1 and im dedicated.