Thank you for trying to patch this. 

Extreme campus controller can manage Wing, Identifi app, and extreme cloud aps from under one roof, including 6e/7. 

The OVA file is the base install file, and on its own can manage wifi 5 aps. 

The .dve file upgrades the appliance to support 6/6e/7. 

The OVA must be installed and licensed to have upgrade applied. If you need a demo license key for 90 days, please telegram @jkuntr