Need to deactivate license

I have licenses for 3 computers. Just had new installs of windows on two of them. Went to activate em client and it says that i have too many licenses activated. I have the correct key but do not have login info to get in and deactivate the two old computers.,

Hi Paul,
I’m having trouble locating all your licenses, do you know under which email / emails you registered them? Please send any relevant info you remember about these licenses to [email protected]
Are all of these PRO licenses? Or are some free?

Best regards,