I have been able to successfully use the 'Lan & Wifi' app to manage multiple wifi profiles (home, kismet, travel, etc.).
On the 'Network profiles' tab:
I simply click the 'Create new' button, then it asks for a name. Then I click the 'Wireless' radio button.
Then I go to the 'TCP/IP & DNS' tab and enter in the details. I have found that I need to check and then un-check the DHCP box and DNS box in order for the tab to let me enter data (because I run static IPs at home).
Then I go to the 'Wireless' tab and enter in the necessary data there.
When you're done entering in all the necessary info, go back to the 'Network profiles' tab and click save.
To change between profiles, I just launch the 'Lan & Wifi' app and select the appropriate profile name (from the drop down) and click 'OK'.
It's been 100% reliable for me!