Hi there,
Regarding your questions:
<blockquote>My question is once I register the url and I am using edenite does that preclude me from changing the template to another? </blockquote>
No. You can use as many template on one licensed domains as you like. However, you need to register these licensed domains before your membership expires. Otherwise, you could not add/update domain for legal template usage any more.
<blockquote> I am still learning both joomla and the joomlart template club and while I like the ednenite I would like an opportunity to switch among a couple of templates via the template manager that my customer might like….then I would register the appropriate template/url.</blockquote>
Please remember to upgrade to JA dev if you want to customize our templates for your clients. Or for alternation, ask you clients to purchase a membership and register his domains so that you can modify our templates for him