Portable paths break as soon as you change computers.
Example:
You define : {Control}{Shift}{Alt}XVIEW=RUN: K:\PortableApps\XnViewPortable\XnViewPortable.exe
Works as long as you are on the computer that your portable device = K:\ .
As soon as you move to another computer that has a different letter for your portable device (lets say I:\). The above command breaks and will not work at all. And this happens regardless of weather or not the path is inclosed in "" ("K:\PortableApps\XnViewPortable\XnViewPortable.exe" for example.).
This was tested on Window 7 Pro + Home, and I am a Administrator on both computers.
This is fixed in 1.20 Rev 2.
Sometimes, the impossible can become possible, if you're awesome!
Thank you for the Quick fix John!