Deleting your Registry Folder (Needed when down patching below the Lifeblood update)
By MickelyMickely. Last updated
If you're having issues with Hollow Knight after downpatching from a patch after 18.104.22.168, you may need to delete your game's registry to fix these issues.
To delete your registry folder, press Win+r to bring up the "Run" command line.
Enter in "Regedit" and select Ok.
Scroll down to find the "Team Cherry" heading. Open this heading to reveal the "Hollow Knight" folder; then, delete that folder.