This guide will cover the upgrade process for Taranis to OpenTX 2.2.0 on Windows 10. It will likely be applicable to other Windows versions, but other operating systems may differ drastically.
Caution! When upgrading your Taranis, you will likely lose all your models and settings. If these are important to you, back them up! It may be possible to perform the upgrade without losing this information, but I have not tested it. Read the release notes on the OpenTX page for more information on this.