How do I have to configure the %config-file% section [ExclusionList] to keep wimlib-imagex from capturing certain files from the %source-list%?
I tried to exclude two files by this:
[ExclusionList] works with --source-list, so I'm not sure what went wrong for you.
One caveat is that if you use an absolute path glob (one beginning with / or \ -- note, it doesn't matter which type of slash you use), it will match separately from each source directory.