UPDATE:

I tried the reload aircraft option several times but without success.

As soon as the plane loaded, the windows would slide back open.



That wasn't the worst of it though:

Well it turns out that more was wrong than just the windows.

The buttons/knobs worked behind me at the engineers station, but up front nothing was clickable.   Not just non-functional, but actually non-reactive in that there was no flipping or twisting animation when clicked on.

I ended up deleting and reinstalling the whole mess and am happy to report that my buttons are back.

Additionally, somewhere along the way my windows work now so I suppose the reinstall fixed that too.

Thanks for the attention though.