I've just signed up on the new price deal (cancelling my old sub), and now every time I open PS or LR I get a box telling me my trial will end, and offering me to buy again? How can I stop this?
Please login and confirm that your account shows the proper subscription with your adobeid https://www.adobe.com/account.html
Next, sign out and back in to Creative Cloud with the same adobe id : http://helpx.adobe.com/creative-cloud/kb/sign-in-out-creative-cloud-desktop-app.html
If your CC apps still show "Start trial or Buy Now" in Creative Cloud desktop application, or if you launch any CC 2015 product and the pop up shows a Trial message window, please see this link for resolution: