I have payed, but "trial exprired" says the account

check your account to verify your subscription is what you expect and to verify your adobe id, https://accounts.adobe.com

if that shows your subscription, sign out and then back in to your cc desktop application using the same adobe id used to verify your subscription: http://helpx.adobe.com/creative-cloud/kb/sign-in-out-creative-cloud-desktop-app.html