Hey Sondra, long time no hear. Nice to hear from you.

I have a feeling that the Rockettheme templates don't use the standard Menu module for displaying their main menus. You might want to check on that. This matters because Elastimenu is a drop-in replacement for the standard Menu module. It's likely that this is not going to work for you in this case.

Another great option for changing the visibility of menu items is to use Chameleon (used to be MetaTemplate). One of the features of Chameleon is that as the result of any "rule" you can make 1 or more menu items disappear. So you could make a rule that detects "user is logged in", then in the "action" you choose the "join now" menu item from a list of menu items to get unpublished.

Best regards,
Stephen

Yes that's a good method too, if all you want to do is hide the menu items from logged in users (show to guest only). Chameleon though gives you even more flexibility to show things to arbitrary groups (e.g. to 2 sets of groups, like guests + admins) or for certain time periods or GeoIP-based users etc.

Stephen