Brief.
We have issued a patch of the 'order_info.php', 'block_products_top_sellers.php' and 'block_products_related_purchase.php' files after release 3.3 has been issued.
Description.
A wrong field 'is_paid' has been used instead of a correct one - 'paid_status'.
Solution.
Please download an updated version of the files from here:
http://www.viart.com/downloads/order_statuses_fix-3.3.zip
Then extract the 'order_info.php' file into the root folder of your shop and 'block_products_top_sellers.php' and 'block_products_related_purchase.php' files to the 'blocks' folder replacing existing ones. Don't forget to make a backup copy of the current file in case something goes wrong.