click on the user settings icon to see the Profile tab as well as Run In Background Tab.
If the user ,click on the RENEW button or UPGRADE button, a payment page will be displayed
Where, you can make payment for your upgrade or renewal process.
Payment page will be auto generated with your email id.
Click On, Buy Now to proceed
Image shown below will be displayed on clicking the Buy Now button.
It redirects to a subscription page ,where you can subscribe and enjoy the plan.