Boris FX Sapphire plugins for Adobe After Effects can be downloaded directly from the official Boris FX website Official Download & Trial Options Boris FX Hub
Support & Downloads — Use this link if you need to find specific older versions (e.g., Sapphire v11 or v9) or direct installers without using the Boris FX Hub. Step-by-Step Installation Guide Sapphire: The Essentials Suite Of Award-Winning VFX Plugins boris fx sapphire plugins for after effects link
To recap:
: You can access a fully functional trial (which includes a watermark) by signing up for a free account on the Boris FX Free Trial page Legacy Downloads Boris FX Sapphire plugins for Adobe After Effects