Windows 11 File Explorer all messed up

Well, I will try leaving this solution here, although my previous post never got released, and I think most people with this issue have already given up and abandoned this thread...

I did find the cause of this issue, in my case... I use a Windows theming program called WindowBlinds, which enables loading of real themes, rather than the crippled theming system that Windows 11 offers.  It turns out that some (currently unidentified) Windows update at end of 2024, broke the WindowBlinds interface - though the only symptom of this was that Window File Explorer was disabled (as documented here).  Unfortunately, that update also broke WindowBlinds' update-checking mechanism, so I didn't know there was a new version available.  

Once I installed the current version of WindowBlinds (11.06, vs 11.02 that I was previously using), then rebooted, this problem is completely resolved !!  File Explorer now works fine.

I realize that most people posting here, are likely not using WindowBlinds, but this suggests the possibility that other programs may also have been broken by that Windows 11 update... so you might review what other programs you have installed, that are not standard Windows apps....