How to change the order of the slides, albums or portfolio posts?

All you need to do is apply “by date” ordering in WPBakery Albums/Portfolio/etc. shortcode:

And change publishing date of a post in the “Publish” tab->Published on (next to “Update” button):

Or try using this plugin. Don’t forget to uncheck option “If checked, the plug-in automatically update the WordPress queries to use the new order” in this plugin setting.