Updating your Creo application should be automatic! Every time the CadActive application loads, it will search for a new version, and update as-needed.
If this does not happen automatically for some reason, or if you would like to check for an update mid-session, you can also manually update the application.
First, send an email to firstname.lastname@example.org asking for the latest Creo application code.
Once you have received the latest code, take the contents of that zip (the "bin", "text", directories, etc)