Outlook no longer registered

Folks:

Need advice. My version of Outlook is no longer accepted as registeredc/licensed, so I cannot perform most of the functions I need to do (reply, backup e-mails, etc.) I know Microsoft no longer supports Windows 7 but I am just finishing a video project using an editing program that runs on Windows 7, so I cannot  upgrade and take the risk of losing the project(s). Is there any way to get Outlook/Office REregistered on a W7 platform for a few months so I can use the e-mail program?Barring that,  come december and I get my new computer (running W10 or 11) how can I save the e-mails and addresses resident on my old W7 Outlook program and transfer them to the new W10 Office 365?

Thanks. Tom