Hi, please make sure update theme before update Visual Composer.

But you should backup old theme before update theme.

I try access your website but can't.

Follow this to update theme: http://oceanthemes.net/docs/2016/09/19/1-how-do-i-update-my-theme/

If you edited something, you can update this file (replace file) in folder "wp-content/themes/envor"

After active new version, please go to Apearance > Install Plugins to install Redux Framework

Or you can install follow link: https://wordpress.org/plugins/redux-framework/

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