I opened LR5 today, and within develop mode, it said that develop mode has been disabled and that I should renew membership. I purchased LR a few years ago. I read online that one must log out of CC and then sign in again. I closed LR and did this. When I opened LR again, it said I needed to sign in. I typed my serial number in but now it is not accepting it...please help?
You have installed Lightroom from the creative cloud, which requires a subscription in order to use it. It will be necessary for you to uninstall that version of Lightroom and then install from the following website: