I recently had to change my email address. Trying to adapt that in my dropbox account I accidentaly created me a second drop-box account. After finding out about my mistake I took a second attempt and then the email address change worked.
But: Due to that prior procedure I had ended up having now TWO dropbox folders in my Windows box's home directory. After carefully figuring out which one is the correct/active folder I deleted the other unused/unwanted folder (via Window's right-click --> Delete). The folder disappeared from my home directory but turned into a zombie. I.e. it now sits in my recycle bin (still showing the dropbox icon) and seems to be undeletable, i.e. even having emptied my trash now multiple times that folder still sits in there and doesn't go away.
How can one completely remove a Dropbox folder deleted from the Windows file system?