Let's say you started with a free listing and now you want to upgrade your listing to enjoy more features. You can follow these steps in order to do that.
1-) Log in to the Sponsor Area
2-) On the right side of the page, you will see a Increase Your Visibility button. Click on it.
3-) On the next page, it will show you your selected plan (listing level) and other listing levels. Choose the listing level/plan you want and click the Continue button.