Support seems to know. They told me once that it automatically places a backup in the AC folder, because "some people wouldn't know how to set up a backup." But, at least a window should pop up.
Both Jon and John are correct. You can change the settings also directly from the backup icon within the AC folder, which of course, ends up being identical to Jon's method.
If you do not want a month's worth, which I consider at least 25 more than you need, you can manually delete them.
By the way, one of the best software programs out there is called TreeSize Free or TreeSize Pro. It allows one to find where large files are that should not be there.