When I got a new computer, it automatically synced all of my files to dropbox and put it in one file. I did not want that. I want to choose what files to put there. I unlinked them and now I can't open my files on my computer. Help!
It sounds like you enabled the automatic computer backup feature in the Dropbox desktop application.
Could you first try disabling the computer backup from Dropbox using the steps in the above article to see if this helps? Afterwards, you can move the folders and files back to their previous locations, which will also delete them from the Dropbox account online.
If there are any deleted files, try recovering them from the Dropbox site.