Please note, before downloading an EXE file, FireFox sometimes presents two options:
 
What would you like to do with this file?
 
1. Run this program from its current location or
2. Save this program to disk.
 
Always select the second option. First, save the program file to your local computer drive, then double-click on the downloaded file on your local computer drive to launch the installation program.

If you select the first option and try to install the program from the website, errors occur during the installation and the program will not run correctly.