My 750Live always gave me a notice when I switch it off but at once it is gone, it was the voice from Clint Eastwood that say "I´ll be back"
Where and how can I activate it again ?

You wouldn't have got those unofficial TT customizations from Navitotal because we've never really been involved with them, only the official ones.

Most of the TT customizing site's like tomtomheaven.com etc have closed down now so if you don't have a backup, you could be out of luck.

Thanks problem is solved.
I don´t know what has happen but I reinstall navcore V9.702 which I download here and it works again.
I thought I had to activate something which I could not find but this works faster, I did not think about this solution.
Now that we talk about it is 9.702 much different then 9.701 ?
I use it on 750Live and 940Live