Uninstall, but keep changes

How to load Microthemer’s CSS styles even after uninstalling the plugin

00:00 Start of video
00:42 Go to Settings > General > Preferences > Inactive
00:46 Copy some code to your theme's functions.php file
00:58 Or download a simple plugin for loading Microthemer's CSS
2:08 The above options are better than copying and pasting CSS