Hi Tim,
Thanks for reaching out with your BoldGrid Post and Page Builder questions.
As of right now Post and Page Builder does not have the ability to globally update “modified” saved blocks across your site from the block editor. You would need to edit each page, remove the old block and manually replace it with the modified one.
I think this is a great to feature to have implemented into Post and Page Builder so I will definitely reach out to our developers about adding this functionality.
Focusing specifically on your site footer though you do have the option to globally set this in your Crio Pro WordPress theme using a custom footer template.
Crio’s custom page headers and footers use the same drag and drop functionality as the Post and Page Builder so it’s totally possible to set a global footer for your theme.
Take a look a guide linked above and let us know if you have any questions on configuring your custom footer.
I hope this helps! Don’t hesitate to reach back out if you have any questions for us.