If you *really* want to use ULM to set your Relto books, you can remove the ULMServerLinkBook.inf file from your Uru directory, Offline KI will then create the Relto according to what ULM saves. However, if all you want is just linking to a so-far unreleased age for testing, there really is no need to use ULM - "/link Agename" is (in my eyes) even more comfortable than a Relto book, and you can continue to use your main installation with Drizzle. You can also manually create links in the Relto Shelf with the Offline KI following the instructions at http://diafero.bplaced.net/technical.html
However, both the manually added links and removing the config file will of coruse be un-done when you upgrade the Offline KI, unless you manually take care of it.
It surprises me no one has a solution.
That was less than 9 hours between your two posts. Do you really expect us to reply to every thread within 9 hours, especially if these are during the night? (yes, there are people here who live in Europe)