The "Wireless Networks" tab is only present if the Wireless Zero Configuration service is running. When third-party wireless networking software is installed, it tends to take over and disable the WZC service.
Go to "Start > Run", type SERVICES.MSC and click OK, scroll down to the Wireless Zero Configuration service, double click it to open its Properties sheet and ensure the service is "Started" and that its Startup Type is "Automatic". That should reinstate the Wireless Networks tab in the network connection's Properties.
The problem is that, when you reboot, the third-party wireless software may again take over and disable WZC. If that happens you need, if possible, to uninstall the adapter's wireless software and reinstall the adapter with *DRIVERS ONLY* so that Windows' WZC manages the wireless networking.