Don't run scramble manually. Just run whatever the name of the executable that you rename PoEHUD.exe too.
It will pop up a window telling you that it is scrambling. Close that box and click back into the game. The HUD should appear in the game. If the game loses focus the HUD will disappear until you click back to the game. If that still doesn't work reboot and then try it again, you may have a old stuck PoEHUD process or something.