Thank you again for your help. I have been able to change my URL and my Live Composer Page Builder is still activated and working fine.
FYI . . . One interesting note. Now that I’ve changed the URL every time I log into my WordPress Admin area Google Chrome brings up an ‘Enable Cookies’ error even though cookies have been enabled. I go in look at the cookies settings (I don’t change anything) I click done and then Google Chrome is happy. Weird?