Recently my hard drive crashed and I lost my Dropbox folder on my desktop. I can still log into my Dropbox account, but don't have access to the folder on my desktop that mirrors what I have on Dropbox. How do I get it back so I can add files to my Dropbox account? It was suggested that I download the Dropbox app for desktop but was told I was trying to add another version of the app that wasn't allowed for my basic account. What can I do?