I found no easy way.
I had to go to my host’s cPanel/File Manager/public_html/wp_content/plugins/Woocommerce_pdf_invoices/includes/admin/templates/invoices/simple/micro and then hand edit body.php, footer.php, or header.php word for word, depending where the problematic text was.
Perhaps this was a long way around, but it was the shortest route I found.
Hope it helps and hope the issue would be fixed.
