To upgrade your Amzpecty subscription, just login to Amzpecty.
In the dashboard, you will see button. Click it to select from the upgrade options.
From the options list, select your desired plan to upgrade to. Click the appropriate Subscribe button.
The Paypal checkout page will show. Just Login and complete the Paypal Checkout process.
After Paypal checkout is successfully completed, logout then login in Amzpecty and your account limits should be increased according to the new plan you availed.
Don't forget to cancel your previous Paypal Recurring Payment Profile.
If you have further questions/clarifications, please don't hesitate to contact Amzpecty Support.