>>After having dragged a file, an icon becomes semitransparency and continues moving with a cursor forever.
In this case this bug is not OD itself,but windows's bug,I think. Please re-try drag file and drop it. And what ever occurred, please post it here again.In my environment, my OD works fine ( Windows 10 Pro version 1511 Build 10586.164 )
>>A revision of this application is not released more than one year.
yes, I am waiting new updates that make OD fully compatible with Windows 10. Because some of apps are invisible and non-label, and doesn't have action-center docklet, Cortana docklet,etc.
>> A dock is not often displayed even if I bring a mouse close to a dock.
you need to touch of edge of screen to show them.