I PAY MONTHLY SUBSCRIPTION FOR PHOTOSHOP CC, but today i cannot open it - says trial version has expired - what do i do to open it as I have paid my subscription for this month?

Log out of your Cloud account... Restart your computer... Log in to your paid Cloud account

-Sign in help http://helpx.adobe.com/x-productkb/policy-pricing/account-password-sign-faq.html

or

A chat session where an agent may remotely look inside your computer may help

Creative Cloud chat support (all Creative Cloud customer service issues)

http://helpx.adobe.com/x-productkb/global/service-ccm.html