Note

This is older software that requires a PowerPC Mac or an emulator for the "Classic" environment.

Questions about the math behind this software are better addressed to Pierre Legendre.
It may be that what you are trying to accomplish is better served by the cross-platform "R" program, to which we have a few references here:

http://www.bio.umontreal.ca/legendre

The most recent version is 3.4 alpha 9. Here is a link to that version compressed as a modern zip archive:

Permute_3.4a9.zip

Source, in Pascal (for historical purposes)

Historical releases