The latest version of VSS3 TDM can be downloaded from this page.
Older VSS3 TDM versions are available below:
VSS3 TDM 1.1.16 for Mac OS X (PPC)
Please note: projects saved with newer VSS3 versions will not be recalled correctly when downgrading to VSS3 1.1.16.
Please refer to this FAQ for information on how to un-install your TDM plug-ins