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these days I've been having problems with WPBakery (for example it doesn't show the Instagram feed anymore), and although I do an update, it asks me to download its latest version 6.2. Do you have an updated download link for WPBakery?
You can get the newest plugin version here http://www.mediafire.com/file/l3gka3lcxwyprc6/visual6.2.zip/file to update for your site.