Backups I guess.
Though I am not sure backwards is, erm, the way forwards.
If you are having trouble I encourage you to search the forums for related threads - and especially take a look at the Update Announcment and the second “Known Issues and Solutions” post attached to it.
If you are still having trouble then create a post detailing your problems.
I will leave a guide here for that purpose as it will include how to format code, etc.