From old feedback: Regenerate CSS in Uploads/Cwicly when theme changes | Cwicly
Further to my previous request regarding the use of child themes. It appears Cwicly generates the CSS in the Uploads/Cwicly folder whenever a page/post/template etc is saved in the editor. The issue now, is if you change themes, the CSS is outdated. Based on my review of your code, I am not sure if it is possible, but it would be nice to have an action hook, filter etc that can be used to force a rebuild of the css.