In order to upgrade or downgrade you need to be logged into your Shopify account.


To Upgrade:

1. Go to "Apps"

2. Click "Upgrade" button. 



or  


To Upgrade/Downgrade:

1. Go to "Apps"

2. Go to "Settings"

3. Click "Upgrade" (or "Downgrade")


(If needed, open the images in a new tab in order to see more clearly.