Trying to figure out how to use the DLL file in powershell

[AlecMcCutcheon]

I keep getting:

Exception calling "StartProcessAsCurrentUser" with "1" argument(s): "Arithmetic operation resulted in an overflow."

running this:

[murrayju.ProcessExtensions.ProcessExtensions]::StartProcessAsCurrentUser("C:\Windows\System32\WindowsPowershell\v1.0\Powershell.exe")