Thanks, we have rolled the website back to ACF 4.4.12 which is working fine now.
Strangely enough I can now also see updates for the add-ons in the updates section which weren’t there before.
I wonder if I update the add-ons first and then update ACF to 5 it would then work as planned?
I will setup a dev version of the site to try it out first I think.
