... I change recently my pasword. But where I can sign in on my Google account on the Q 10 pro ?
I posted the same problem back in August: http://www.futeko.com/newforum/index.php?topic=2207.0
The HiMedia firmware does not allow you to change your Google password

You could try this possible solution first:
http://www.futeko.com/newforum/index.php?topic=1934.msg16234#msg16234
But I decided to rebuild my Q10 with the latest firmware. Then, when you run a Google app for the first time, you will be asked to enter your password.
If you do want to rebuild, don't do it yet because Futeko has just announced that:
***There will be a new Q5/Q10 Pro firmware next week (30/10 - 3/11) ***
so it would be more sensible to wait until then?