[2022] ALL my Stellaris DLC files corrupted

Try again!  

This issue is addressed in the patch release notes:

[Dev Team] 3.6.0 'Orion' Released (checksum 0028)

Hello all! Our last major patch of the year is ready for you: 3.6.0 "Orion" should be available for download at this moment. Yet again the team has packed it full of extra content, gameplay tweaks, QoL changes, bug fixes, performance and... forum.paradoxplaza.com
Known Issue: We have become aware of some reports of the launcher incorrectly stating that DLC installs are corrupted. This is a purely visual bug, and we are currently investigating a fix.


All the best!