Brief
We have updated most of includes files.
 
Description
Any user can type his currency code in the browser bar and even if this currency is deleted from admin, it is still passed to a payment gateway.
 
Solution
Download the updated version of the files from this archive:
http://www.viart.com/downloads/includes-4.0.5.zip
 
Further, extract the files from 'includes' folder in this patch into 'includes' folder of your shop via FTP in BINARY mode replacing existing files. Please do not forget to make a backup copy of the current files in case something goes wrong.