Glad to hear the hotfix worked for you!
To unlock The Absolute Pattern, the game needs to register that you've seen the 4 base endings. If you already saw them before the update, just reach any base ending again, like Control or Submission, then click Continue.
The upgrade should appear in the shop on your next run.
You also need at least 30 Certainty and the other final upgrades purchased.
I’m traveling right now, so I can’t fully test it yet, but I’ll check it properly next week to make sure I didn’t break anything.