You can always download your license keys from your personal client area at http://clients.translation3000.com/. Use your registration e-mail as login. Your password is contained in your original purchase notification.

In case you do not have your login data, please contact Projetex support at https://aithelp.com/Tickets/Submit , stating your name and registration e-mail (the e-mail address you used when purchasing Projetex).