After login, select 'Agile Operations Software' from the drop down at the top of the page and then click 'My Downloads'.
In the 'My Downloads - Agile Operations Software' search box, search for 'Test Data Manager' and you should find 'Test Data Manager', then click on it.
Click on 'CA Test Data Manager for Masking and Subsetting Seeding MULTI-PLATFORM' for example if that is the product that is shown and that you are licensed for.
If a different release is needed to the currently shown default release, then select it from the dropdown.
You can then download 'CA Test Data Manager Full Package' by clicking on the cloud download button.
After that, download other installation files as needed, for example, the Repository Kit.