Salient 8.5.4 is Now Compatible with Woocommerce 3.3.1 . Kindly update the Theme if you have updated Woocommerce . 

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Add Text to Footer Right .

Hey Again,

Add this text in the copyright section in Options Panel: http://prntscr.com/9y6qim

<span style='float:right;'>  Test text </span>

Also add this into the Custom CSS box located in your Salient Options panel (Make Sure there are no red cross in the Box) :

#copyright .span_5 {
    width: 100% !important;
}

Best.