Please help, my key disk is inserted, my A6 demo installed, but I can't find the file Key.exe on my A6 extra key disk to unzip all the files.

is the floppy-disk empty?
if you have buyed it at the last few days (at conitecs online-store), contact conitec that they send a new one. i had problems too (CRC-error) and i got a new one for free

if you´ve buyed it second hand or its older, you have to pay 39$ for a new disk