What does “Reset the minified files” do?

Pressing the “Reset the minified files”:

• Deletes the temporary files used when generating the minified assets
• Deletes old minified files (more than 30 days old)
• adds a folder for the new minified files, which will be generated when visiting a page

The previously minified CSS files will remain on the server until they expire, or until they’re deleted using the button “Delete all the files generated by minify”.