Start by copying all files from <old_appdata> to <new_appdata>. You can selectively copy some files again later to keep the old and new server in sync (e.g., copy over scheduled tasks after they are modified on the old server). This completes the migration of the following:
q License file - The server will not start without a valid <appdata>/DatawatchLicense.xml. In 2020 you also have the option to use Altair units licensing instead of the XML file.
q Properties file - The set of properties in <appdata>/Streams.properties that the server understands changes between releases. The first time you start it, it will add new one and remove old properties.
q Scheduled tasks - All scheduled tasks are in SCH files in <appdata>/Schedule/.