If you just bought a license and want to switch from PPI to that license, or if you logged in with the wrong account, you can change this in the application.
In the Application part of the WORKFLOW tab select Settings. In the lower left corner of the application an Application settings panel is going to show up. After you expand Licenses in that panel you will see a Change application owner tool. Click on the button Change and you will be prompt to log in again.
This is used to change an account in the application, by signing in with different credentials or by using different log in option.
If you log in with the same account, you will be able to switch between licenses.