To keep track of the (sometimes big) changes between versions (including this latest change to FADEC), I have found this YouTube channel invaluable. The guy is a real helicopter pilot and I love how he mixes his sim instructions with details and stories from real life:
His video for version 0.82, which reveals that you now have to use the mouse scroll wheel on the engine switches to go from off, to idle, to fadec, is this one: