An update for Epubor Ultimate was just pushed out, and the new version can now handle KFX2024 DRM.
*Of course*, they've stolen Satsuoni's work. Sat's key extractor is placed in the K4PC installation path, and when you launch Epubor Ultimate, the K4PC app starts up automatically and creates a memory dump.
It's a real pain when you're trying to do anything not related to Kindle.
Why couldn't they just think to add a button to launch the K4PC app?