Support for WXSIM is currently hosted on the Weather Watch Forum under the WXSIM Section. I provide free support via email or by phone (after initial email contact). There are also some helpful documents, which are included in the download package, but which I'll post here for convenience:
Quick Start Guide (updated 2/5/2017, using a very recent version of the software), as WXSIMQUICKSTART.PDF
'Readme' files for WXSIM, WXSIMATE, and Autolearn and WXSIM-Lite
WXSIM's User's Manual
I plan to post a Frequently Asked Questions section here. If you are a user, and either have a current question, or recall some questions you might have had while getting started with WXSIM, please email me and I'll collect and answer them (at least the frequently asked ones!) here.