That is the howto 
, there are also a bunch of previous questions - for example: One pc displaying 2 different xibo content
What happens when you click on the EXE? You get the Xibo options screen?
Positioning the player is achieved on the “Location” tab of the Display Settings Profile in the CMS - this is instead of the screenshot shown in the linked topic. You will need a new profile for your second, third and fourth monitors, with the coordinates of each.