The normal reason for the Develope module being disabled is because a trial period of the software has expired, and it's possible your computer is confusing the end of the CC trial with the use of a perpetual copy of Lr.
The best way to solve this is to uninstall and then reinstall your perpetual copy of Lr, assuming you haven't tried this already.
Thanks! Do you know where I need go to find my perpetual copy of Lr to reinstall. All I can seem to find is answers about downloading creative cloud Lr. Thanks again!