Hmmm... if it turns out you are actually flying with CEM etc and still only see the throttle icon (This is an odd little bug I have noticed a couple of times), alt-left click in the general area so the box becomes visable and then click away again and the other sliders will appear.
I just wish it was possible to have the Alt, speed etc displayed like the old Il2.... my eyesight is not getting any better and my Facetracknoir tends to start going a bit mental if I wear my glasses..... it has enough of a problem with my crooked nose. lol