I already had purchased Lightroom 5 as an ongoing upgrade last year. I have now moved onto CC with PS and LR. I had some issues in getting PS to work correctly with BR - now resolved and LR was working ok yesterday. Today I have opened LR and went to use the develop module. LR has now said it has been disabled and I must renew my subscription to reactivate it. What is going on!!
This is a somewhat common problem. The solution that worked for me was to clear out the SL Cache folder as described in this tech note: