I encountered having to update my Omnitouch 5.7e's today. So if you don't know how to update the firmware, here's how:
Download these firmware files:
FILE 1 of 2: English – 188.8.131.52 – http://www.homeauto....E_V30013_EN.57e
FILE 2 of 2: Version V3 Updater – http://www.homeauto...._V3_Updater.57z
Then you have to put those two on a USB. They told me you need a USB with less than 4GB of memory, and someone else said you need one with at least 4GB. So try both. Put both files on the USB, with no other files, and then stick it into the bottom of the touchscreen. Follow the prompt and you should be good to go.