I paid for CC, but Lightroom won't install. Trial version is useless - an empty screen. I have no serial # - I'm guessing because nothing installed

Antonia-

I don't have enough information from your post, and I am not sure if you are on mac or pc,  but see if one of these fits your issue:

If you don't see "install" by Lightroom in the application manager, please first try signing out and back in:

https://helpx.adobe.com/creative-cloud/kb/sign-in-out-creative-cloud-desktop-app.html

If creative cloud is asking for a serial number when you start a Creative Cloud (CC) application, see this link: Creative Cloud applications ask for serial number

IF when you open an application that's part your Creative Cloud membership and you see a message stating you're running a trial, see this link:

Creative Cloud applications unexpectedly revert to trial mode | CS6, CCM

If you updated the desktop installer and the screen is blank: try this:

Rename the opm.db file.

1. Close the Creative Cloud application if it's running.
2. Navigate to the OOBE folder.
   Windows: [System drive]:\Users\[username]\AppData\Local\Adobe\OOBE
   Mac OS: /User/<username>/Library/Application Support/Adobe/OOBE folder
3. Rename the opm.db file to opm_old.db
4. Launch Creative Cloud

finding hidden files on mac:http://helpx.adobe.com/x-productkb/global/access-hidden-user-library-files.html.

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