Follow these steps to restore the file from Quarantine:
1. Open Ad-Aware and choose *Scan System* (Big green button in the middle)
2. Select the *Quarantine* tab at the top
Click to view attachment
3. In the list of quarantined items, find the family name of the false detection (in this case it was W32Tr\.\perDelf you see in the list)
4. On that item, click on the black down arrow next to the words "do nothing"
Click to view attachment
5. From that drop down select *Restore* (#1 in the screenshot below)
6. Then press the *Perform Action Now* (big green button at the bottom) (#2 in the screenshot below)
Click to view attachment
At that point you should the item disappear from the list and it should be now restored to it's original location.