This is a Feature release.
It incorporates support for the SSIS Catalog, which is stored in the SSISDB database.
This release addresses the issue Analysis doesn't support SSIS DB Catalog
To scan an SSIS Catalog, use the existing /i or /isDbServer parameter to point at the SQL Instance that has the SSIS Catalog.
Or utilise the Executor, and tick the Enumerate Packages within SSIS, which will show up the SSIS Servers tab, where you can enter the instances where the SSIS Catalog is hosted.
If you attempt to run the analyser for a version of SQL Server that you do not have installed, then you will receive errors about missing DLL's. The DLL's are the SSIS or SSAS DLL's that are provided with SQL Server.
This is expected behavior.