Factory Reset
You can return Vera to the factory default state, wiping out all the configuration changes you have made.
First, if you want to reset the Z-Wave network, that is the list of Z-Wave devices that you have paired using Vera's black Z-Wave dongle, open Vera's Setup page and click 'Devices', then 'Z-Wave options' and then 'Reset Z-Wave Network'.
Next, if you also want to reset everything else in Vera, including any changes you've made to Vera's networking, any rooms or scenes or users you've added, your location settings, and so on, then from Vera's setup page click 'Advanced', 'Backup' and click 'Restore Factory Defaults'. Or, instead of clicking that button, you can press the black button on the back of Vera marked 'restore' twice in rapid succession. If you use the black restore button, then watch the power light on the front of Vera. The power light will go out when Vera is doing a reset. In order to avoid accidentally resetting Vera and losing your data, you have to double press the black button quickly. So if the power light doesn't go out, try again until it does.