Wild thought: this problem couldn't perhaps be caused by the settings of your graphics card (to the effect that its settings instruct it to show the video window on a non-existing second monitor)?
Do you see a
video-window at all (even an empty one)?
(this with "Borderless play window"
unchecked/
deselected under
(rightclick >) Options > Preferences > Video [General] before loading and playing a movie)
If not, please check/select the box (also there) "Don't remember movie window position"; exit BS.Player and after that try again.
If that doesn't work, exit BS.Player, then find/locate (e.g. using Window's search) a file named "BSplayer.xml" and rename it (e.g. into "xBSplayer.xml"). After that start BS.Player agian and give it another try.
Any result?
P.S.:
Depending on what preference you selected at BS.Player's installation this .xml-file could be found either in
- BS.Player's installation folder (default C:\Program Files\Webteh\BSplayer(Pro) or in
-(for XP) C:\Documents and Settings\[Your Name]\Application Data\BSplayer(Pro)
-(if Vista) C:\Users\[YourName]\AppData\Roaming\BSplayer(Pro)