Instructions
Download Warcraft-Dota Version Switcher and extract the program on to your computer.
Run the file "Wvs.exe" to install the program.
Click on the "Options" button and enter your "Warcraft III" installation directory, which will be on your main hard drive in the "Program Files" folder.
Exit the options menu and click the "Switch Version" button. Double-click on the patch to which you want to change "Warcraft III." Close Warcraft Version Switcher if the patch you want to run is not included.
Download additional patch files and place them in the Warcraft Version Switcher folder. Run the "Wvs.exe" again and the new patch files will be in included on the list of available patches.