You might want to upgrade to a higher plan when you need to manage more contracts. To upgrade from Regular to Premium or from Premium to Enterprise, do the following:
1. Go to the Burger menu and click on Users.
2. Click Details and then Edit user.
3. Change the Subscription level and click Save.
Make sure that you do this for all users on the same level (Company or Location).
Here is a video that shows how to upgrade: