I had a computer crash (virus) so had to reformat. When I try to upload lightroom told need to deactivate one computer. If the computer is no longer possibly to be in service how do you activate the new computer
What is the exact version of LR you are using?
Is it a Stand Alone perpetual license version or do you subscribe to the CC Photographers plan?
Contact the Adobe sales(?) team. They can help you with this common request.
It is LR 6 and a stand alone.