OI! It's hard to speel corriktly when drunked!
Anyways, the standard (black) WGP reg doesn't have the external adjuster, so I never tried changing the pressure on that one - the ergo/ego has the bottom adjuster.
I seen it today anyways, apparently it's anti-clockwise (out) to raise the input (technically output but that's another story) pressure, and clockwise (in) to lower the pressure.