Make sure you are logged into your account at https://secure.myshorttrack.com
Click the green “Upgrade” button in the upper right corner, next to the orange plus icon and blue question icon.
The Upgrade form will show in the middle of your screen. Simply select the plan of your choice, and complete the purchase information.
If “Upgrade” does not appear in the upper right, simply click your name next to the user head.
You will see the plan options. Just select “Upgrade”, and it will take you to the Upgrade window explained above.