I believe I've made peace with the app. Now, maybe I've had to do this in the past, maybe not.
NOT using the Aero Snap feature, I've a manually sized and saved under Screen/Preferred/Save.
Now exiting/launching the app, the desired main window(pane) size is restored.
I think I'll keep README notes entitled I D 10 T to keep around for my "custom" setup.
Thanks Lynn for all you do for our community!!
P.S. Yes, on the HF modem, I was only testing. I will run a separate instance if needed.