This guide outlines the process for upgrading Mendix applications, providing essential information for users to implement their own upgrade strategies. It includes details on Mendix's release cadence, specifying the types of releases such as Medium Term Support (MTS) and Long Term Support (LTS), along with their respective end support dates. The document emphasizes the importance of understanding version deprecation, feature support, and potential breaking changes that may arise during upgrades. Additionally, it discusses security protocols and the change management process necessary for a successful upgrade. Users are encouraged to assess their business impact when prioritizing which applications to upgrade, ensuring that the right apps are upgraded at the right time. The guide also highlights the roles involved in the upgrade process, including developers, testers, product owners, and UX/UI designers, to facilitate a seamless transition during the upgrade.