I think it depends on the version you have.
For version v7.x:
1. Open the antivir main page (double-click on the system tray icon)
2. Clik on "Configure automatic protection settings" in the left panel
3. Click on "Advanced..."
4. Go to the tab "Exclusion"
5. Press the "Add..." button
6. Enter the full path and file name of BSplayer (for example:
"C:\Program Files\Webteh\BSplayer\bsplayer.exe") and confirm
If it ask you to include subfolders just say no (or uncheck the related option)
If you have another version, search for the configurations for your security settings, and then for advanced options!
Bye
