Upgrading from 3.0

Hi friends

Any comprensive guide for upgrading fromo 3.0 to 3.x???

I’m not a programmer/developer and have installed an OJS in a domain.

I tried to understand Git but seems it needs to have been used since the very start.

Any guide for upgrading somewhere??

when downloading the zip of the latest version ojs check folder “docs” for information hoow to upgrade.