sometimes when i try to move or delete movies dopus wont let me, says "copy error" i look in process explorer and dopus.exe is the process that is locking the file i want to move! this is what windows explorer did and i was trying to get away from!
It's probably the Description column in Opus. If that is turned on then Opus will open movie files to work out what codecs they use and other information like their width and height. Since this can take a while for some movie files it means that Opus may still be accessing the files when you try to move or delete them.
(An alternative to disabling the column would be disabling the Movie plugin. Maybe the best thing would be for the movie plugin to have an option so you could tell it not to populate the description column, although it's often quite useful that it does.)