Foundation Stacks Mismatch since upgrade

I upgraded to Stacks 3 and all Foundation stacks are updated and current (1.5.16). I have also downloaded the current Foundation Theme (1.5.3).

I have re-started Rapiweaver but am still getting a Foundation Version Mismatch warning when previewing in RW.

I note that a lot of my project file stacks now say “(Legacy)” after the stack name in edit mode.

Am I expected to have to re-add all new versions of the stacks in the project files?

And ideas? Was all fine before Stacks 3 update…

Please watch the videos that I did on Foundation 1.5.