Reply to Traktor MIDI Mapping Dissapears

I got to a gig last evening , opened up my laptop and found that my all the commands in my mapping for my VCI-100 had disappeared in the Traktor settings window and none of the controls where working. I tried to reimport the .tsi file but nothing happened. Luckily I had a USB so played out on CDJs but was such a hassle.

Does anyone know how to solve this?