After adding a new table to my database schema, I found that I could not see it in the Project Build dialog without EXITing MatchMaker, restarting and recreating my project.
Consider including a REFRESH button to refresh the meta data cache or not caching at all.
I am in the final stages of implementing this refresh feature. I'll follow up here when it's working and available in the nightly builds. Naturally, it will be included in the next official release.
This did go in a few days after my previous post, but I forgot to respond here and introduce you to the feature.
The refresh feature "just works:" every time you visit a munge process (now called a transformation in DQguru), it will double-check the physical database for you and adjust your input and output steps as necessary. This check-and-adjust also takes place when you start an engine.