Changing site domain breaks collage

It seems the collage uses absolute not relative paths to WordPress images.

Is there a way to update all paths to a new domain?
I used a staging domain before going live. I would now like to retire the staging domain.

The following SQL query updated the paths to the display images:
UPDATE wp_posts SET post_content = replace(post_content, ‘http://labelleflowers.jacknisbet.co.uk’, ‘http://www.labelleflowers.co.uk’);

But, I get an error when I try to update the links for the Clickable Images (Lightbox).
Error: Allowed memory size of ____ bytes exhausted
SQL Query:
UPDATE wp_postmeta SET meta_value = replace(meta_value, ‘http://labelleflowers.jacknisbet.co.uk’, ‘http://www.labelleflowers.co.uk’) WHERE meta_key = ‘eic_grid_data’;

The memory limit is set to 400mb. The page uses about 20mb. After updating the links the page maxes out the memory. If I disable the plugin, the page goes back to 20mb.

The page I need help with: [log in to see the link]