The first thing that you will set after installing HotSpot is Network.
Network settings can be manually configured or through simple wizard which autostarts when HotSpot is run for the first time.

If you prefer manual way, open HotSpot - Setup - Network - Network Setup page.
After that choose Network interface over which computer access to Internet on the left, and local network adapter over which clients connect on right side.
Select Autostart option and save changes.

Press on Start button.