We’ve updated the firmware and examples for the Himax WE-I Plus and you can now build these using the free GNU Toolchain! Hopefully this will make your dev board a bit easier to use now that you don’t need a paid compiler anymore 
Firmware is here: https://github.com/edgeimpulse/firmware-himax-we-i-plus
And instructions for the standalone example here: https://docs.edgeimpulse.com/docs/running-your-impulse-himax