By pursuing an updated PDF, you are honoring the Nath tradition’s emphasis on precision. Gorakhnath himself wrote that "Yoga perishes where there is error in the nada (sound/phoneme)."
Because the copyright on the original text is expired (Gorakhnath lived 900 years ago), but translations are copyrighted, here is how to locate legitimate, high-quality "UPD" files: goraksha samhita pdf upd
For a high-quality translated UPD, you may need to purchase the ebook from Kaivalyadhama or Motilal Banarsidass. Beware of "free" files that are malware traps or incomplete versions. By pursuing an updated PDF, you are honoring
If by "upd" you meant versions or legitimate downloads: By pursuing an updated PDF
The most reliable English PDF is often the translation by Swami Vishveshvarananda or the version published by the Yoga Publications Trust .