There's a tab in Timer Finder that says 5th gen DS Parameters. Click on that tab and and press Find DS Parameters.
A window will then pop up. That's your Parameters window. Fill out the info on the right side first. To find your Mac address, you need to look in your C-gear. Go to the Wifi in your C-Gear and click the little Wrench and hammer button. Then click on Options, then System Information. Then copy your mac address into that bar without the dashes and spaces. Tell me when your there.