Seems to not be working after I upload file. I get the following error in Chrome's JS console/

Uncaught TypeError: Cannot read property 'length' of undefined DataPlot.js:198 reader.onload DataPlot.js:198

That might actually be because your LocationHistory has no locations in them (Due to you having location services turned off). I will add a check so that it will tell the user a nice error when this is the case.