This is a "print" file that will load and unload filament in/from your extruder. This is especially useful for flexible filaments that can't be loaded by hand. Also for the Flexion Extruder. which doesn't allow easy tension removal.
The file only works with gcode printers, such as the Wanhao Duplicator i3. It does not work with Replicator-style like the Flashforge Creator Pro (but those printers have built-in load/unload functions anyway)
This file tells your printer to do the following:
Heat to 210°C
Lift up 50mm
Center (100mm in X and Y axes)
Wait 10 seconds
Go back home and turn heaters off
The file is commented with what each line does, so can be edited as you like (change temperature, remove the retraction step, lengthen the extrude, etc.)
Ignore the bracelet - Thingiverse requires a 3D file to post this.