Download Expander Deleting Expired Keys
 

I am having an issue with Altered Carts Download Expander. In the "manage Download Keys" it has a button "Delete Expired Keys". Since I have installed it it has created over 300 pages of download orders many of course have expired. I would like to clean up the database and delete them but nothing happens when the Delete Expired keys is clicked on. It will look like it is processing then stops with no results. The Delete Selected works but I do not have the time to go through 300+ pages. Any help would be appreciated.