WordPress makes plugin deactivation simple enough — just go to the “Plugins” section, find the plugin, and then click “Deactivate.” But what if you want to get rid of a plugin for good? Here’s how:
FTP
How to Backup Your WordPress Theme
If you’re about to make a modification to your theme files that you aren’t sure about, it’s a good idea to backup your theme, especially if your theme is custom-made (i.e. you can’t just re-download it if something goes wrong), or if you have many other theme modifications you want to preserve.
Here are two ways to do it:
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