http://bugs.winehq.org/show_bug.cgi?id=32833
--- Comment #1 from Sergio Callegari scallegari@arces.unibo.it 2013-01-30 04:04:46 CST --- Let me conclude the last sentence in my report:
Another instance of the wine explorer opens at "C:Program Files". This is a sign that wine cannot see the chm file at all since the path gets truncated at the "(" char.