To simplify things and help our users to be more productive, we have archived the current forum and focus our efforts on helping developers on Stack Overflow. You can post new questions on Stack Overflow or join our Discord channel.
Not really, no. You might get parts of it to work (Button for one might), but there are quite a few classname and element structure changes that would make it a rather big operation to backport Valo to Vaadin 6. Most likely it would be easier to port the application to Vaadin 7 instead.