undir

Un-Directories any directories that contain 1 file

ignores .info files
ignores .srt files (unless directed with "srt" argument)

Install into PATH

Place the undir binary into one of the 2 path locations

Under Windows the binary will be undir.exe

Just close and re-open your Terminal/Command Prompt for this to take effect.

Linux

/home/<user_name>/bin

You may need to make that directory

Windows

maketecheasier talks about the windows path, and how to modify environment variables.

C:\Users\<user_name>\AppData\Local\Undir

You may need to make that directory