I just downloaded the latest version of the desktop app, because Drop Box would not let me sign in. When I try to launch the installer, the screen comes up, asking for permission, then, after I click yes, nothing happens. I'm trying v1.36.51. I have tried moving the files, unlinking the account, uninstalling dropbox and disabling the virus scanner. I have tried re-downloading, downloading on another computer and downloading the offline installer. None of this works.