If you are looking for a way to get your “Details” moved back to the bottom pane then use this safe tool that doesn’t modify any system files and is easy to install and uninstall.
It comes with a few other features as well that may or may not be useful to you.
The tool is called OldNewExplorer and can be used for Windows 10, 8.1 or 8. It’s a shell extension / tweaker which can undo “improvements” to file browsing made in newer Windows version. Everything is optional for your liking.
Download it here (and more details/features): OldNewExplorer