It's very strange as few days ago after the response from the DEV I tried again and I was able to delete files with no problem after first stopping the video playback and then use the delete shortcut. I tried again tonight and it was not working! I stopped the playback first, but after choosing delete HereSphere crashes and close. When I open it again the file I tried to delete is still there and if I try over again I get the exact same result! Also I found that one of the files successfully deleted the last time was back! (Certainly never got deleted) .