New deployments of LMOS 7.2.55.0 (and later versions) in the Amazon Web Services (AWS) cloud use the latest AWS Nitro-based machine instances, as described in the 7.2.55.0 Release Notes. Downgrade to an earlier LMOS version was not supported at the time of the 7.2.55.0 release. With the changes made in 7.2.54.2, LoadMasters deployed on an LMOS 7.2.55.0 AWS Nitro machine instance can be downgraded to 7.2.54.2 (and any later 54.x versions).