Automatic cleanup - save settings not work

Нi there,

Tell me how you can save the setting of "Automatic cleanup" in the backup parameters? I click "Save settings" button, immediately I go back to the settings and see that the "Automatic cleanup" parameters is not saved.
What do I need to save the parameters of the "Automatic cleanup"?
I use last build of ATH 2015/Windows 8.1/Account without admin rights.

WBR,
Igor