By the way, are you using BI4.0 SP04 Dashboards with SP02 BOE? This is not a supported scenario. You should keep Dashboards and BOE on the same SP level.
I am having a similar issue where I have created a Dashboard with a Unvierse using Query Browser in a Dev environment, and am now moving the Dashboard to another environment.
I have moved the Universe to the new environment, but in a different location, and wish to edit the Query Browser queries to point them to the new Unvierse.