Click SET (or SETUP) on the remote to go to System Settings.
Scroll down to go to more setting.
DO NOT EVER SELECT Reset settings
Select Network to set up WiFi, or to change DNS server
Select Video to change resolution. If your TV is connected to the box via composite cable, select video output mode: NTSC 480. If you are using HDMI cable select: 720 or 1080 video output mode.
Select Graphic resolution: Same as video
Select Audio to change Initial Volume and Audio output mode.
Press F1 to go to more settings
Select Advanced Settings to change Language (Polish is currently not available), Time zone, and Buffering.
DO NOT EVER change UPnP client enabled setting
After applying any settings, select Restart portal