Launch the Amahi Installer by double-clicking in the desktop icon. Firefox should launch, with location http://localhost:2000. Check the installation troubleshooting wiki page if this is not working for you.
Enter the install code for your HDA in the box and press Submit
After the install completes, your HDA should be working, however, it's required that you reboot to get everything working
After the reboot, your HDA should be fully functional. Login using the username/password you created in Fedora. Enjoy!
If your HDA has network connectivity and you are satisfied, you can then optionally turn off your router/gateway's DHCP server and reboot all the systems in your network (so that they all get their DHCP lease from your HDA). This is the recommended configuration, where you enjoy all the features of your Amahi HDA.
If you prefer to NOT use your HDA's built-in DHCP server, turn it off because it's on by default and it could cause conflicts