keyboard shortcut to select file in windows explorer

After launching Explorer, press F6. This toggles between the file list, the address bar, and (annoyingly) the close button for the "folder tree" pane. While on the folder view's close button, you can press tab to move into the actual folder tree.

Try shift+tab that will tab in the reverse order

Alt-Enter sometimes works from the address bar. It seems a bit temperamental though, not properly figured it out. Using Windows 10