The reverse and forward mapping wizard to which you are referring are the so called "old" way of working with open access. Since our new way - the domain wizard is the first choice of most of our customers we have decided to make it the default way of working with OpenAccess. You can still, however, switch to the old wizards and use them instead. Should you decide to stick with the old wizards please have in mind that they are in maintenance mode and no significant development time will be invested into them(besides fixing crucial bugs if such are found). Here is a nice blog post on the matter that also explains how to switch between the different menues.
the Telerik team
Q1’11 SP1 of Telerik OpenAccess is available for download
; also available is the Q2'11 Roadmap
for Telerik OpenAccess ORM.