Hi, Paul,
Yes I just check Template Wimble, Version is 2.0 and when I did what you sent me, Ive got this message:
"Missing field in database: Joomla\CMS\Table\Extension   extension_id."
About, Joomla updates Core problems, Im sorry but one of products what Joomshaper is selling are also and quickstarts. How I will know that there is a problem. Maybe guys from Joomshaper should check first all products before pitting something on market. Again, Im not a programer, I only need someone to resolve this problem. Thanks