CAMPRO HD SOFTWARE
Airlive also bundles their CAMPRO HD software with the OD-2025HD but since you may have an older version i suggest checking their official support page for the latest one.
The very first time you start the program enter as default user name admin and leave the password blank (until you set one yourself).
As you can see by default the software starts in 4-window mode and since it's still not configured all 4 windows are empty.
You can setup your camera(s) by heading inside the System Setup tab and clicking on the search button (if that fails you need to enter manually the user name, password and IP address of the camera).
Once you setup your camera(s) you can switch between the various window modes from single and 4-way up to the highest 64-way mode.
You can also use your own emap (house/office/company drawing) to know where each of your IP cameras is located (quite useful if you have lots).