As a matter of fact, you can. First get your current wifi.ini by typing this into a browser:
Save that file to your desktop, or copy/paste it into a new file with that name. Then open it and add the line
apabright = true somewhere under [network]. Then go to the /help page on your Game Frame like this:
Under Replace index.html, click Choose Files and point it to your new wifi.ini. Then click Upload. Reboot the Game Frame, and you should be good to go! You can check it using step 1 above.