Hello, I continue this topic because on my side it don't work.
When I remove "shop1.json" file in /www/config/themes/my-new-theme, the file is not generated again after loading page and I have a 500 page error both
on my front and my back office. I lose all access.
Fortunately I have saved this file. My only solution was to re-upload this file to get back the website.
I am on 1.7.6.7 version.
Any help will welcome 
Thanks