A Hotfix is an update to the latest program files within a release, not a full version change. It allows you to get the latest updates and fixes for your version.
If you require a hotfix please raise a new case online and reference the title of this article. The relevant team will then get in touch with you about the next steps and if any components need to be installed.
If you require an upgrade, from Proclaim 3.4 to 3.5 or Proclaim V4, then please follow the steps in this article.