We'd need to see more of the source to help un-obfuscating it. I'm guessing that the code to do so is after that variable $AXJXS..., look for the closing quote (").

IANAL but I would guess that since the business appears to be gone probably no one would raise a fuss about un-obfuscating the code... due diligence would probably be to check and make sure that the company hasn't just changed their name, also trying to contact the original developer.