Did you ever solve this? I've had the same issue lately, but with the original 2004 DBB game.
What you're looking for is the Degausser tool, which you can find on GitHub. The current version, last updated in 2017, actually removed DBX support "temporarily", but never added it back. You can still revert to the previous commit, compile the tool, and get the functionality back.
No promises, but I'm working on trying to develop a web-based SAV editor for the 2004 game, because I ran into the same issue of piles upon piles of broken links that were missed by the Internet Archive. I EVENTUALLY found it after several weeks of scouring the internet. Perhaps I can incorporate DBB DX support as well.