The creative cloud version doesn't use serial numbers; it is activated by subscription and sign-in. You need to uninstall it and then download and install the regular version. Then license with your 24 digit serial number which starts 1160.
Your photos and catalog will be safe and will not be affected by uninstalling.
Current products can be found at this link: click for latest downloads
What - exactly - happens when you enter the serial number, Robert?
many thanks- after deinstalling it works !
2015-04-03 11:25 GMT+02:00 99jon <email@example.com>:
serial nummer does not work after testing free LR in the creativ
cloud abo created by 99jon <https://forums.adobe.com/people/99jon> in *Photoshop
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