I changed computers and do not have disk  need to reinstall Lc on my new computer

You can download your copy from Adobe Licensing Website using your adobe id/email id which you should have used at the time of purchase.

https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CB4Q FjAA&url=https%3A%2F%2Flicensi…

In case you face any problem, contact Adobe customer service.