After making the purchase via Paypal, or via our reseller/affiliate site, you should wait some minutes to let a review. When all are OK - for example it is an authentication issue - the transaction status will change to 'Completed' and the expiry date of your account will be updated automatically.
In case it does not update automatically, please check your email which you used to login to the affiliate site, you will see the license code like below picture.
Copy the license code from the email content. Access the user control panel website, where you see the link 'I have a license code' from menu 'License':
Paste the license code to text-box and click Apply button to extend the expiry date of your account.