I do not want to make a cron job, I would like to know how to adjust the number of backups, just like in the previous version.
If that isn't available yet, I can wait.
Or is there an issue with my admin permissions?
yes this was removed from the tools -> backup, and was missing in the main config. This has been added to the main configuration section for next release of admin2.
That looks like it's syncronized.. although i'm not seeing the 'backup' job added to the scheduler.. i'm looking at that now.. What are you not seeing syncing up?