re-reading the 1st post that seems the case. anyway, here's the modified version.
; This script is to bring up Farr window via mouse
; Source: hxxp://www.donationcoder.com/forum/index.php?topic=2812.msg58794#msg58794
#SingleInstance, force
#NoTrayIcon
;Set path here
Farr_exe=%ProgramFiles%\DonationCoder\Farr\FindAndRunRobot.exe
MButton::
Process, Exist,FindAndRunRobot.exe
If ErrorLevel <> 0
Send, {Pause} ;'Pause' key is the default
Else
{
Run,%Farr_exe% -tray
Sleep, 1000
Send, {Pause}
}
Return