Bright is a powerfull tool with many options. We only use one of it.
You have to start it with the proper parameters. You can do that iwth the batch file (Bright.cmd) you can find in our download section.
Or just start it from a DOS box/command prompt with parameters like this one:
It tells Bright to convert every BMP file and to save it again as a BMP file.bright *.bmp -o -bmp