My Galaxy S has recently changed my market verification from my standard google account to my youtube account. I have deactivated my youtube account yet I can not work out how to change my verification on the phone back to my standard google account. Thus at the moment I can not update my apps or search for new one's. Why did it change anyway in the first place? 
PS I have tried going to settings/apps/manage apps but there is no google app listed within to update.
Thanks
PS I have tried going to settings/apps/manage apps but there is no google app listed within to update.
Thanks