I have been using iGo8 for quite a few years and had a iGo8.3.5 version running.
Then without changing anything I had the followingError message:
FFUIerror

FFUIERROR: Unknown layer referenced
Identifier=[ui_DriverAlertPic]

I read on the internet that it was related to the data.zip and possibly the branding.zip and I copied other versions onto the SD card.

Then I had the next error message:
Fatal Error

Fatal Error occurred in main thread

Address: 0x00181df4
Exception: 0x0000005

just when the starting notice came up on the display.

Any ideas what I am doing wrong?