Where can I download older versions of the free plug-ins that may be compatible with my system?

You can find an archive of our free plug-ins here:

https://www.bluecataudiofiles.com/Vault/Products/Archive/

We usually do an archive for every major change (like plug-in format or platform changes), so you should be able to find an archive for most older platforms (we even have PowerPC versions for Mac out there!)