hi! i was wondering if someone has already developed a strategy how to update products in zope. for example, you are running a site that uses the Confera-1.2.0 product and it is populated by several thousands of messages. now DC releases a bug-fix version 1.3.0 of this product. you can put that in your lib/python/Products folder, restart zope and newly created confera's will be version 1.3.0 of course. but how can i update my old and running confera system from 1.2 to 1.3? an instance from the (here) Confera class is created when you create a new Confera object in the management interface and the class definition is saved with this instance somehow?! unlike zclasses. could anyone shed some light on this problem/phenomena please? thanks thilo