adasiek like all the steps to upgrade from beta 2 to beta 3 but skip the part where u have to go to yourdomain.com/admin since u already manually upgraded
Also what i keant by "i changed the version in the settings table" is
In the settings table (known as config in beta 2 but u have to rename it) there is a column stating which version of flarum the db was updated/installed in .... That's what makes the flarum installation determin if it needs to update the db or not.... We don't want that in this case so you have to edit that to say it's the latest version
Also want to add up that you should copy the migrations table from ur new flarum installation and import it to the one you're upgrading....this will help prevent issues i faced before