When I read that this program enabled you to have a double-pane Windows File Explorer I must admit I expected something completely different. But the thing is that this application is not really a standalone file manager, but just a small tool that enables you to tweak the way Windows Explorer displays your files.
Side-By-Side Explorer puts an icon in the system tray from which you can open a single Windows Explorer window with the folder of your choice, or two simultaneous windows, each one with a different explorer. It may sound too simple but it can be very convenient to move files between folders and it's also a fast way to access your most frequently used folders.
The program is supposed to keep the windows's size and position, but that didn't work for me. Also, I didn’t like the fact that all the Explorer windows you open display the folder sidebar and there's no option in the Settings menu to disable it.