The zip package does include 32bit and 64bit version.

About the plugin:
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This is a procedural 2D texture map plug-in module to be used with Autodesk 3ds Max (tested on 9.0). The implementation makes use of Ken Perlin's famous noise function - although a noise texture is already included in 3ds Max, this plugin extends the present algorithm with a simple to use, but extremely powerful and popular noise function.

Perlin noise is a function that has a pseudo-random appearance with values changing smoothly from one point to another. It can be used to create a great variety of procedural textures to increase the appearance of realism in computer graphics.

Installation:
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Copy PerlinNoise.dlt into 3ds Max' plugins directory (e.g. 3DSMAX_PATH/plugins).