"If you purchased CKFinder, you should put your license key in the config.php file:
If you leave these fields blank, CKFinder will be fully functional, but it will be running in demonstration mode."
Tue, 07/05/2011 - 09:48
#1

Re: licence ckFinder
Documentation Manager, CKSource
See CKEditor 5 docs, CKEditor 4 docs, CKEditor 3 docs, CKFinder 3 docs, CKFinder 2 docs for help.
Visit the new CKEditor SDK for samples showcasing editor features to try out and download!