Hi. I'm on Windows 10 with a 64 bit processor. However, my music editing program Audacity is a 32-bit software only accepting 32-bits plugins. So my question is: Is there a 32-bit version of Permut8? (some installers seems to automatically install 64-bit versions on my machine)

Sure, our plugins come in both 32- and 64-bit versions. The installer will let you choose which version to install and where.

If you have a 64-bit Windows it will select 64-bit by default. You need to enable 32-bit manually.