11/16/2018 at 3:43 pm #477232
Both CSS file are only updated when a template update is released. The min files are not automagically created from the non-min files. Changes you make to the non min files will not automagically be made to the min file. You can edit the no-min file and then manually update min file to include the same changes.
But you don’t have to do that for your purposes…
slim-plus.css file to the folder I referenced in a previous reply. Make your changes. Connections will from then on load that file for Slim Plus regardless if the CSS files are updated in a template update.