In a word YES for the J6 GO 930.
I just installed the latest Critical Update for TT Home and then after that was complete connected my GO 930 to be Updated which I was under the impression from a previous message from TT that my GO 930 was going to be OK with a Software Update that was part of the total update.
WRONG!!!!!!!!
The Update was installed, then a message advised me that the TT GO 930 would 'Restart' which it did and I then got the 'Select a map' screen and choosing the Europe 1025_9386 provided an ERROR Message telling me that the map would not run on this TT!!!!
So at the moment I am buggered............
But I will do a Restore from a previous Backup and if now't else is forthcoming, then see what happens on April 6th.