I cannot find a Ruby 2.0 installer that works. When I use the link on lichproject page for RubyInstaller (which you also get from a Google search for Ruby Installers..) all links on the download page say Forbidden. The other Ruby Installers are too current, they are above 2.0 which is not going to work with Lich according to their documentation.
Just reactivating after several year layoff, maybe have it on a laptop if necessary. I can send myself a copy of Ruby I guess but does anyone have a better solution?