The Altair comes with a removable Hot End which makes it super easy to switch them out. Follow these simple steps to switch your hot end out.
1. Remove the black Bowden clip from the Filament Driver by sliding it out sideways from underneath the small black ring holding it in place.
2. Use your finger to press that small black ring towards the filament driver while pulling the Bowden tube out.
3. Now take the black wire harness that running into the base of the printer and carefully pull out on it. There should be two black plugs that slide out.
4. Unplug those two two plugs and then grab the hot end and pull the magnetic arms away from the hot end and you. Your hot end should come completely off.
NOTE: you may have to rotate the wires to get the plugs to come out. Just be careful not to pull too hard.
Note: If you are running the most up-to-date Firmware it is recommended to run Auto Calibration after installing the new hot end in order to automatically set the bed height for all future prints.