My student opened a new company as suggested and tried to restore the 2021 backup file and it did not work! Student received the same message that I sent in my earlier post.

Please help. As the professor I have Sage 50 2019 educator resources, the students have a Sage 50- 2019 textbook and they had to install Sage 50 2021 software in the last minute.

I'm not sure how this will work. All suggestions are welcome but I have to get this resolved so the students can work in the course.