Known issue with windows 10. MM hasn't released a fix yet but they've announced that they're working on it.

Submit a request via the link at the top of the page to let them know that you need the license server reset for you. 

Hi Walter,

Mike's got it right! To stay updated when more information concerning this issue is available, click the Follow button at the bottom of this knowledge base article: Needing to register/authorize every time you open Finale notation software.

Our development team is currently working on a solution; however, for the meantime, please feel free to use the Submit a request link at the top of this page to contact a Customer Success agent and get set up with a temporary workaround.

Hope this helps!

Thanks for your help!!

No problem, Walter!