I cannot find an answer to for several weeks. Perhaps my experience in development is not so great :) One site uses the JCH Optimize plugin and I noticed that after clearing the old memory (cache), the CSS and JS file links do not change, i.e. the names of these files remain old. The problem is that the browser checks the file name and if it has not changed, then the site visitors show the old version of the style file. The question itself, where in the plugin (in which code file) I can add some GET parameters ?vers = 1.1 so that for the browser it is a new file and it would update the information for users. I will be glad to hear any solutions. Thanks.