I bought the rt_meridian_j15 in 2009 and today got an email from my hosting company, that they do not support Joomla 1.5 anymore (shutting it down in april 2013)
You have to renew your template club subscription in order to download J2.5 version of template. You will also need to migrate your web site to Joomla 2.5. Search google how to do that