The BlueBridge Glossary Webpart for SharePoint Framework (SPFx) is available for free. No fees are taken for downloading or using it.
Follow the instructions from the documentation section to install the BlueBridge Glossary Webpart on your Office 365 / SharePoint Online.
In the following list you can see the latest version on top. This video will show you how to find out the version you have currently installed on your system. Only the number before and after the first dot are noted below.