I uninstalled the Dropbox app from my laptop as its file structure would not sync with the web version.
When I reinstalled it, it had retained the old incorrect file structure; I uninstalled it again using this article (which I may have misunderstood as I am not technically minded)
Now it won't reinstall at all - I run the installer, it says "on your marks" and nothing happens.
I'm now unable to access files on my laptop which was the whole point of buying a subscription!