where did you get TraxHost-master from?
that is not included in the zip file!
Id assume you have downloaded from GitHub, but that was not part of the install process as described in the install file. which you must follow exactly, no extras/deviations 
you can delete this folder.
as mentioned in the install instructions this is correct behaviour!
to invoke Trax, you need to
- power down your rack
- hold down button 2 on the XMX
- power up your rack, whilst continuing to hold button 2 down
after a while (can’t remember how long - 15 seconds?) Trax will appear on screen.
note: it takes a bit longer the first time, as it will scan for plugins when it first starts.
to revert back to Synthor
- power down your rack
- hold down button 1 on the XMX
- power up your rack, whilst continuing to hold button 1 down
i.e. when you boot up holding button 1 will start synthor, button 2 will start Trax.
let me know if this works, but from what I see above, it looks like you are all set to go.
interesting idea, something for Bert/Percussa to consider.