After download the package, please proceed with the following steps:
Please unzipped the archive.
Disable cache at System -> Cache Management.
Unload the contents of the module package to the Magento root folder. This will not over write the existing Magento folders of files, only the new contents will added.
Use SSH, go to Magento root folder and run command below:
1. Run command update database : php bin/magento setup:upgrade
2. Run command deploy : php bin/magento setup:static-content:deploy
Refresh your admin user access rights: logout from your store admin and then login back. Next, please Enable Cache.