Brief
We have fixed the 'admin_filter.php' file for release 3.5.
 
Description.
There occurs a DB Error while removing filter.
 
Solution.
We would recommend to download an updated version of the file from here: http://www.viart.com/downloads/admin_filter-3.5.zip
 
Further, extract the above mentioned file into the 'admin' folder of your shop replacing an existing one. Don't forget to make a backup copy of the current file in case something goes wrong.