I think I am running into a bug...
I added a wing movement control parameter and added a Morph (Controller) stack modifier.. In the right hand side menu, I am able to select a mesh, and the vertices appear on the screen. Then I select "Start Editing" and am able to select vertices and manipulate them fine.
After some point while working on the vertices, not sure of exact reproduction steps, AnyPortrait starts selecting the point of origin in the background instead of the mesh vertices (see attached screenshot).
I still am in Editing mode and the mesh is still selected in the right hand side menu but there is no way to select any mesh vertices. The only thing that is selectable is the point of origin in the background grid. I tried ctrl-A and tried mouse right click and drag (both methods normally work) but now I can only select the point of origin as indicated in the attached screen capture. I also tried switching to the Rigging Stack Modifier and back. I noticed that Bone Rigging is now also broken - i.e. no vertices can be selected there either - just that background point of origin... I also tried turning on/off the light bulb next to the selected modifier in the modifier stack, which did not help... I also tried toggling the lock icons at the bottom left corner of the screen, which did not fix the problem either. I also tried toggling ALL icons in the top menu bar - nothing fixed the problem. I also tried selecting different meshes, adding and removing controller keys, but nothing works...
At this point I have to close the AnyPortrait editor and re-open it to be able to select vertices again. It will work for a few minutes and go back into the bad mode making it unusable... This bug makes it difficult to complete the animation. Any help is greatly appreciated.