Magento 1 extension file:
The Omnivore extension for Magento v1 is available to download here: Omnivore Magento 1 Extension v1.1.7
Instructions on how to install Omnivore for Magento 1
Magento 2 extension files:
Download file for Magento 2 v1.2.0
Instructions on how to install Omnivore for Magento 2