OS/400 V5R1 & Client Access for Windows

Yes or No. Will Client Access for Windows work with OS/400 version V5R1? We are currently on V4R5M0 and using client access for windows because we need the NS Router Anynet function. In December we are upgrading to V5R1. Do we HAVE to move to Client Access Express? Will the old CA for Windows work with V5R1? Is it just the support for the old CA going away?