I've written up instructions for updating the OVMS firmware for non-developers. Developers who want to work on the code have to go through a complex procedure to download the source code and install the tools needed to build and update the firmware. It's a lot of work if you're not going to be partying on the code. Fortunately, there's a much simpler procedure if you just want to update your box to the latest firmware. Once you've been through it once, it's very quick and easy. The hardest part is removing the box from the car and undoing the four screws to get at the circuit board. You'll have to invest about $40 in the gizmo that transfers the bits, but it can be shared if there are other OVMS owners nearby.