Hi trogggy
Thanks for your really helpful reply.
I struggled to find the skin.estuary folder from usr/share/kodi/addons/. I can't seem to find it with the Kodi UI.
Yes you are right trogggy, I downloaded the latest version of skin.estuary. I didn't know what I was doing. But since then I found a Branch for Krypton on the GitHub for skin.estuary which I downloaded and modified. It still failed to install. I found this puzzling as I thought what else could be wrong?
I'm on a Mac, and some time ago I recalled having an issue with the Mac Default Archiver and using the resultant .zip file elsewhere due to the Mac Resource Forks being saved in the .zip file. So I used a different archiver this time called Keka which you can use to filter out the Mac Resource Forks. After that my modified skin.estuary finally installed with Addons on top of the list. Sweet!
Thanks so much to both trogggy and DaVu. I didn't have a clue without you!
For my next final tweak I would like to delete the Search on the Top Bar going across the screen as it keeps scrolling off screen which is a bit irritating. I suspect its in the code again, not sure where. I may try DaVu's advice about debug-mode (although I don't know how to switch it off after I've finished with it). Should I open a new thread for this, or continue here?