I know, I realize it's a source problem. The problem is that these dictionaries are anywhere near what can be considered a useful dictionary.
I'll try with the ones you mention, but I suspect they're pitifully small (their file size certainly seems to suggest so). What I'm looking for is an open source French-French dictionary of the size and quality of the Websters 1913 English one. And the Littré seems at least to promise that... but I haven't been able to find a convertible format now for months.