Brief
We have updated the files 'admin_table_categories.php' and 'admin_export.php' for version 3.6.
 
Description
Product Category export function fails in 3.6
 
Solution
We would recommend you to download an updated version of the files from here:
http://www.viart.com/downloads/admin_table_categories-3.6.zip
 
Further, extract the above mentioned files into the 'admin' folder of your shop. Do not forget to make a backup copy of the current files in case something goes wrong.