How to safely update WordPress plugin

open your site wp-content/plugins folder by ftp client, filezilla for example
rename previous plugins version folder in the wp-content/plugins folder, for example as: meta-data-filter-old
upload the latest version of the plugin to wp-content/plugins folder
after the plugins files uploading go to the plugin settings page and press 'Save' button

that is all....
p.s. you can always roll back to the old version by folder renaming. If all is ok (after your testing of site functionality) just remove old version of the plugin ...

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