I should address the uncertainty in the blog post. It's important to clarify that there's no known software by that name and offer alternative solutions. Maybe they confused the product name with another. Perhaps they meant a different model or a similar-sounding software.
Since this is "generic" hardware, the software is usually distributed via specialized satellite technician forums or social media groups dedicated to "Sunplus 1506TV" updates. Source Type Recommended Action Community Forums dvbs1506tv10otp0 new software 2023 link
Do not power off the device during the process. The receiver will reboot automatically once finished. I should address the uncertainty in the blog post
If you could provide more details about the device (like the manufacturer) and what you plan to use it for, I could potentially offer more specific advice. Perhaps they meant a different model or a
Legitimate hobbyist firmware is always free. Any site asking for a credit card is a scam.