Limit on e-mail accounts

I have purchased E-Client Pro 8 which should allow a number of email accounts. However, I am getting the message that I am limited to only 2 accounts unless I purchase Pro Version. I habe done this but I still get the limitation message.

Did you activate your Pro License?

You do that by going to Menu > Help > Licenses, and first deactivating the Free License, and then clicking on Activate and pasting in the Pro License activation key.