Go to profile > My Subscriptions

Click the edit icon to the right of the subscription you want to upgrade

Choose the desired plan for your myFitment account and click the Update Subscription button

To add a new account to your myFitment Profile, Go to Profile > My Subscriptions

Click Create New Subscription

Here you can Select the plan and marketplace you want for your new account and Create Subscription

If you have any trouble adding a Fitment Plus account, please contact customer support through the chat bubble with the User ID you're using