Instructions:
Extract the archive to your Configurations folder, start WinUAE, go to Host panel/tab, select "Fullscreen [vsync] [A1200 audio filter]" and click on "autoload" to enable the mechanism.
Restart WinUAE, select the Alien Breed configuration, click "load" button and look at the "scanline opacity" option on the Filter panel/tab which is at 50% but it instead should be at 0%.
@DamienD: I wish to change a lot of display options DamienD. I even tried to use Notepad++ but in the end I messed up a lot of things and had to start again!
