Hi lukevikas,
Answers:
1) Power cycling - This is just either pressing the reset button the gateway OR unplugging the gateway from power and then plugging it back in. Basically, you are resetting the gateway.
2) Re-Configuring - You can enter the SSID within the gateway configuration in mcStudio. If you want to change the confifguration, you can connect via WPS and then go and enter the SSID OR connect with ethernet and then change the SSID for your WIFI. Check out this video to help:
Hope that helps,
let us know if you have any other questions