I've tested the new version of B4JPackager (v 1.13) and it works correctly for this case. The only thing you have to add manually to run_debug.bat is the -dark command line parameter (if you want dark mode - which seems to be the preferred mode for ABMGruidBuilder). For run.exe, use it with the -dark command line argument. Alternative would be again to change B4JPackager's code to include -dark command line option (in the same places (with new line numbers) as this fix). Either that, or
@Erel produces another B4JPackager11 that allows for command line arguments.