Are you looking to use this for , or are you trying to prepare files for a GDEMU ?
For a hands-on look at how to use the software to extract and edit game files, check out this guide: GD explorer help Ian Micheal Dreamcast-Talk.com• Jan 7, 2023
: It is frequently cited as the first step for anyone looking to translate or hack Dreamcast games, as it allows for easy access to game assets.
While early versions like fixed major parsing bugs, the most stable and commonly used version found on repositories like Romhacking.net is v1.6.3 .