Hello,
I can see that you have a license for Cross DJ LE, where you able to install the software and it appears to be running correctly, but you are unable to use your MIDI controller?
Make sure that your controller is plugged in and turned on before booting up Cross DJ LE.
Here is a shot of my MIDI page with the mapping you should select. My version of Cross did not have the ENV-1274 but this controller looks identical. Your version may have the ENV-1274 listed.
Screen Shot 2017-09-22 at 4.44.21 PM.png
Let me know if you need more help getting things setup.
Best regards,
Adam @Mixvibes