If you encounter issues with the patched version of Nitro Pro Enterprise 12.4.0.259:
Mark, one of the junior accountants, had been frustrated by a deadline. The company’s official PDF editor was acting up, and instead of waiting for a ticket, he decided to "fix" it himself. He found a forum promising a fully unlocked enterprise version of Nitro Pro—no license keys, no cost, and allegedly "high speed."
—was a popular release from several years ago [2, 4]. Here is the reality behind these types of "patched" files: The Risks of Using Patched Software Security Threats:
It sounds like you’re looking into "patched" or cracked versions of Nitro Pro Enterprise