The example GeoTIF with calibration files are available at: https://www.dropbox.com/s/bkws9fsmv3hz7w1/KZ_picker_smugglers_EX.7z?dl=0 or https://boxup.uni-potsdam.de/index.php/f/38210279
Please note that the calibration files are generated to work with KZ-Picker (and not KZ-Topo-Picker).