Quote Originally Posted by mc12345678 View Post
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I don't see (or perhaps understand) why the auto-installer was not used and instead a manual query was executed.

Add to this, would suggest that the uninstall query (found in YOUR_ADMIN/includes/installers/zen_colorbox) be executed at least twice based on the menu not appearing in the configurations section...
Just to confirm - you were quite right that running the sql install on top of the auto install appears to have been the culprit. I haven't gone live with the update yet but tried on test site 3 times, each successful:
1. run uninstall twice. Check phpMyAdmin to make sure old tables are gone.
2. load the new file set
3. go into admin panel - shows Zen Colorbox loaded. Refresh screen to get config menu to appear.

And because base template is Responsive Sheffield Blue 2.0 - edit out the old version Colorbox install code in admin/includes/installers/RSB/2.0, and load this revised file along with the Zen Colorbox files.

Thanks for your help mc12345678