The OS should pick it up. Amahi has nothing to do with devices.3. Power on and hopefully Fedora/Amahi picks up the new USB device.
Recommend you check to see if this is a desktop app. If so, it will not work with Fedora 21 and Amahi. There is no desktop UI.5. SSH to Amahi, navigate to the dir where the package was moved and execute install from the command line:
rpm -ivh powerpanel-ver-rev-x86_64.rpm