When you download and unzip the rmemp12.zip file, the readme.txt file contains:
This program searches folders given on the command line for empty directories, and
removes them. Directories containing files are not removed, and no files are deleted.
The search is always recursive. Multiple folders can be specified on the command line.
Use RmEmpty /? for help if needed.
Syntax: RmEmpty folder1 folder2 folder3 ...