Here are the Q&A tool installation guides for each module:
Prestashop
https://www.avis-verifies.com/eCommerce/prestashop/qa/qr-prestashop-en.pdf
Magento 1
https://www.avis-verifies.com/eCommerce/magento1/qa/Qr_Magento1%20FR.pdf
Magento 2
https://www.avis-verifies.com/eCommerce/magento2/qa/Qr_Magento2%20FR.pdf