If MFTM pop-ups a window when you run it and asks you to confirm a transfer request that shouldn't listed in the download queue, and if it continues to do that even if you select cancel and remove it
MFTM may do that becuse a problem in cleaning the download queue, and you may experience this problem for specific downloads too, in that case
Check your %UserProfile%\Application Data\Microsoft\File Transfer Manager\RequestQueue
folder, you will find the download jobs queue files with .dlm extension, if you don't have any download jobs in MFTM you can delete all .dlm files safely, but if you have running jobs you can open them with a text viewer like notepad to find your problematic file to delete.
