Thank you for sharing the information about the DM520UHD OpenATV 7.2 20230311 (Japhar) firmware. This firmware version is based on Enigma2 from March 11, 2023 and comes with GStreamer 1.20.4 and Python 3.11.0. It is important to note that this firmware requires a Japhar Sim to be installed on the device.
The MEGA link provided in your post can be used to download the firmware. It is always recommended to backup your current settings and data before installing any new firmware on your device. Once the firmware is downloaded, you can install it on your DM520UHD device by following the instructions provided by the manufacturer.
If you have any questions or concerns regarding the installation process or the firmware itself, please feel free to ask for assistance on this forum.