The program we are talking about works on the basis of your Adobe Id & Password, You dont need a serial number to activate the product . Please launch the product and wait for the trial prompt . At the trial prompt , you will get the option to Click on License This software . Once you click on the same , you will have the option to enter your Adobe ID & Password . This should activate the product .
Please do let us know if this worked or not for you .
I just got a promp in Photoshop CC that brought me to my Adobe acount page. But I'm not sure if that did anything, as I dind't need to enter anything.
Lightroom still is in trial mode for sure.
That page isn't available (at least to me).