How do I update the AssetRegistry manually?

At some point in the past on a project the folder containing some blueprints was renamed. Most things worked afterwards, but there’s an issue that within the AssetRegistry for at least one of the blueprints the GeneratedClassPath tag hasn’t been updated and still has the old path.

Fixing up the redirectors doesn’t do anything because it appears that there isn’t one. What can I do to update the AssetRegistry directly?