I purchased a license for MF v3.0 earlier. How do I upgrade to MF v4.x?

MF v4.x is available as free upgrade to all customers who purchased v3.0 earlier. You need to go to the download URL again to download the registered version MF v4.1. You will also need to get a replacement product serial number for MF v4.1 from the same web page. The download URL for the registered version of MF, and its old product serial number can be found in our email sent to you when you purchased MF v3.0 earlier.