Modern to Default Theme

Modern theme is a child theme and demo 1, demo2 or demo 3 all the demos are built using the default theme only by changing the customizer settings. If you don't wish to use modern theme then simply deactivate the modern theme or delete it, and activate the default theme. When you activate the default theme and deactivates the child theme, then some of your plugins will be deactivated and some of the widgets can be removed, therefore after activating the default theme activate the plugins that got deactivated and add the widgets that might got removed. This has to be done manually only. After this go to the wp-admin->wplms->customizer, and import the customizer code of the demo 1 shared in this topic: https://wplms.io/support/forums/topic/demo-1/ This will make your site look like demo 1.