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Choosing between 32-bit and 64-bit versions

The 64-bit version of Indigo should be used if your computer supports it, since it runs faster and is not limited to using 2GB of memory (RAM).

On Windows, you can determine if your computer and operating system supports 64-bit by looking in the System properties in the Control Panel. A simple way to access this is to right-click on the "Computer" item on the Start Menu, and select "Properties":

On the System properties page, there is a field indicating the operating system's bit-ness, which is the version of Indigo you should download: