AutoCode apps generated with Valence 4.2 use Ext JS 4.2 -- the fact that these are the same version numbers iwherever possible it is recommended that you just regenerate the app using the new autocode that comes with valence 5. However, if you've made enhancements to AutoCode apps generated in Valence 4.2 then regeneration from scratch isn't a very viable option.
Take Sencha Architect for an early test drive on Valence 4.0! CNX will be presenting two brand new IBM i educational sessions at the WMCPA Confererence in Delavan, Wisconsin, on March 12. Attendees will not only get a sneak peek of Valence 4.0 a week before its official release, but they'll also see how Sencha Architect can be used to create an IBM i-based web app from scratch in a matter of minutes.