Deleted and re-installed now I’m getting this:
Endless spinning wheel at: Add WordPress built-in scripts and styles as CJT Templates so it can be used throught Templates Lookup form
and
Warning: array_merge(): Argument #2 is not an array in /……/wp-content/plugins/css-javascript-toolbox/views/installer/install/tmpl/default_operations_list.html.tmpl on line 12