Moving a Project 2021 licence to a new user

Does anyone know how I can move a Project 2021 license to a new user?  I purchased a licence for Project 2021 in June of this year, and has a friend load it on his computer with is MS account.  I want to get it back from him, but we cannot figure out how to do it so I can intall and use.  The other user uninstalled it, but it remains tied to his account.