@BlueStateBabe ach, condolences. I agree with @BenA that your best bet would be to try and find the install program. On windows that will frequently have an .msi file extension.
No clue if it's really comparable, but FWIW, this here nominates something called MuseScore as an open-source alternative to finale:
CounterSocial is the first Social Network Platform to take a zero-tolerance stance to hostile nations, bot accounts and trolls who are weaponizing OUR social media platforms and freedoms to engage in influence operations against us. And we're here to counter it.