I have found a fix for Universal Minecraft Editor's broken chunk locator, and I wish to ask a question to provide information on how the fix works. This question is on-topic because it asks about game-specific utilities, listed in the help centre as a valid topic.
I am posting this question to allow this answer to continue to work, which has been since broken.
There is no tag for out-of-game utility third-party programs. How should this question be tagged?