At least for Mac OS X 1.0.1 version bundled on the Production Plus Pack provided with A-Pro keyboards,
F1 in the RaptureLE popup does nothing,
and there are no help files in the Documenation directory, only a registration html file.
One workaround is to install the Windoze version (which does include .chm files),
copy the relevant ones to Mac (e.g. via USB flash drive),
then download the ichm program to read them.