Well, I finally found the filament and AMS reset. The documentation must be for earlier models of the X1 or something. Mine does not display the “AMS” tab on the initial screen. To get to it now, you have to find the little Reel at the bottom-right of that screen and press on it. That brings up the second screen which allows you to set options for the AMS. The picture above does not show it, but there’s now an option to reset the AMS mapping. Then you then need to turn off the X1 and unplug all the AMS units. Turn the X1 back on then plug each AMS in the order you want them. Worked for me. 
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