[LDCad] How to edit group w/o ungrouping?

[G.D. Grant]

I've created several groups with custom centres in my LDCad model to make it easier to rotate these about hinge parts. However, I now want to move/rotate parts within some of these groups without having to ungroup/regroup every time. Is this possible? I tried activating nested editing, but that only works for sub-models, not groups.

Thanks.