McDSP have announced that all their plug-ins are now available in AAX 64-bit for Pro Tools 11 users. For now, only for Mac users, but they say Windows versions will follow soon.
McDSP users can download them from the McDSP download page.
They recommend that HDX users update to Pro Tools 11.0.1….
IMPORTANT: HDX card users please note that this release requires Pro Tools 11.0.1 or later to prevent hangs on session closure. Please visit the Avid website to download the latest Pro Tools installer. The automatic update mechanism in Pro Tools 11 does not seem to pick up this 11.0.1 release, so you will need to download the latest Pro Tools 11.0.1 and follow instructions for installation.