Re: how to fix "Licensing for this product has stopped working"

tapioka,

You may try some of these (whichever relvant),

http://helpx.adobe.com/x-productkb/policy-pricing/activation-network-issues.html

You may try to restart the Creative Cloud application by quitting and relaunching it.

or you may try Customer Care,

http://helpx.adobe.com/contact.html

or Adobe Support (phone),

http://helpx.adobe.com/adobe-connect/adobe-connect-phone-numbers.html