It will ask to pick CDI files to process. Just launch launcher.bat script file under Windows to start the process. This tool was created to automate convertion process as well as to make it easy to crete compilation discs containing several games.
In order to be able to create compilation disc initial CDIs must be in Audio-Data format. Also it’s possible to create a compilation disc containing multiple games to preserve CD-R discs.
To make Dreamcast read any game from CD-R backup flawlessly it worth to convert CDI file from Audio/Data to Data/Data format.