In the documentation for downloading Visual/DBA r18.1 , it says to download the product from CA IDMS/DB for Z/OS plus MVS.
The setup files for Visual DBA resulting from the download are missing.
Release : 19.0
Component : CA IDMS/DB
Our team is working to fix the issue.
Until it is resolved , if you require the files now, please open a support issue at https://casupport.broadcom.com