There's a new version, potentially final unless I mess with the graphic redraw (you'll see what I'm talking about). Regardless, this version's improved over that initial release.
There are two ways you can use FastDrop.exe.
Option 1 is to simply run it and a square window will pop up; then drop whatever executable you want to use on to the window and another
window will open and anything you drop on that new window will be passed to the executable you dropped on the first window as a commandline argument.
So, you could run FastDrop.exe then drag&drop Unlocker.exe onto the FastDrop window and a new window will open and any file you drag&drop on the new window will be sent to Unlocker.exe as a commandline argument.
Option 2 is the intended method and that is to make a shortcut (or batch file, etc.) to FastDrop.exe with a commandline argument pointing to an executable file (relative paths are supported).
So, if FastDrop.exe and Unlocker.exe are in the same folder, a batch file that runs "FastDrop.exe Unlocker.exe" will start FastDrop and any file drag&dropped onto the window will be passed to Unlocker.
In other words, the purpose of FastDrop is to provide a drag&drop capable window to pass a file to another program as a commandline argument. Using, for example, PStart, you can then have a FastDrop window open to make sending a file to a certain program more easily than navigating to a folder with a program in it, and drag&dropping a file directly onto a given exe file.