Each time you clean your registry using the Advanced Uninstaller PRO Registry Cleaner, an undo file is created. This way you are always able to undo the modifications made by the Registry Cleaner.
In order to undo the registry repairs made with the Registry Cleaner, please select the third option (called "Undo previously made repairs") in the first step of the registry cleaner, and then press the Next button.
After pressing the Next button, the undo wizard will display the list of undo files:
The first column of the list above represents the date and time at which the repairs were made. The second column contains the number of problems fixed during the repair session. Select any repair session then press the Undo button in order to undo the repairs.
The Delete undo information button deletes the undo information from a certain repair session.