Hello Rob. I sent you the following information by email:
The Ruby path for the current project is set in Project Properties
For all future projects it can be set in VS Tools/Options/Projects
More information on options can be found in the Ruby In Steel user guide supplied with the software or downloadable here: http://www.sapphiresteel.com/The-Ruby-In-Steel-User-Guide
The relevant pages are page 22 and page 116.
Did that help?
There is also a thread that may be relevant here:http://sapphiresteel.com/forum/index.php?topic=414.0