I have my save function set to 5 minutes. How do I do this?
The auto save function in Alibre
is not a backup ...
it effectively just hits the save button at the interval you specify if you forget to manually do it periodically.
It overwrites your existing files, it does not create a separate copy, it's not that cleaver! It's only real use is, as DavidJ points out, if Alibre crashes. In this scenario, you don't loose all of your changes, just the ones (in your case) that you did in the last 5 minutes.
The best way of rolling back is to either use Windows built-in previous version feature, as Lamar mentions., or
before you start each day, save an Alibre package of your design and name it with the date/time of when you create it. Then you can just restore the package of your choice from the start of a particular day and go from there again. If you happy with progress you can delete the packages from a few days ago to conserve disc space. Alternatively, use a file versioning system or application like CVs, SVN, GitHub, M-Files or Vault and archive your work at particular stages when you are happy with your progress or just want to create a snapshot in time you may decide to rollback to at a later date. I personally do this after I've worked on each major feature of my designs ... like taking a progress milestone snapshot and keeping that nice and safe away from my next working session.
Lots of ways to prevent your pain, but it needs a bit of a dedicated process to achieve it ... in the same way you would with any other valuable piece of data or document.