"Upgrade from Previous Version" becomes "Switch from Earlier application iteration: Users can transition to the upgraded program by upgrading their current software version."
Next paragraph: "With Able2extract Professional 18, users can extract data from PDF files, including tables, images, and text, and convert them into formats such as Excel, Word, and PowerPoint."
I need to avoid changing the brand names. So "Able2extract Professional" should remain as is. Words like "upgrade" could be update. Sometimes, synonyms might not fit perfectly, like "activation key" – but the user wants every word replaced, so each part should get three options.