I see now that help manual under About>Help still shows Ctrl+Shift+T (omitting Alt), but I had to change it since that shortcut is for "Undo close tab" in browsers, so I added that to be the same and I had to add Alt to that .
I am not aware of any explorer logs that will show there, but it should be consistent. For example using "Everything" app, Open containing folder menu should OC, but something like "Bandizip" (if I remembered correctly) will always open Explorer even if OC is set as default.
Explorer will still open on folders that OC cannot open, like control panel items, printers, and other non-filesystem items.