Hi @DDoc, thanks for messaging the Community!
I'm sorry to hear about the ransomware on your device. Dropbox Basic users do get the option to restore files to their previous versions, provided they're within the last 30 days.
If you require more assistance on this matter, I’d recommend getting in contact with our support team directly to look into this matter in more detail.
You can do this by opening an incognito/private browsing window, while not signed into your account, and accessing this link.
From there you should be able to contact support. Make sure to enter the same email you use to login to Dropbox.
Hope this helps!