Show transfer to 1.2.0…

I just upgraded to 1.2.0 on my RH4…
I tried to launch some previous existing shows programmed from 352 and had some random software bugs…
When using show created in previous to 1.2.0 version should I do a 'New Show' and merge all the preferred preferences?
Wouldn't that's still be a repatch?
When merging parameters the patch don't make it correct?