You cannot just copy-paste the repack. You must write it to the SD card using:

: Visit the official website of the device or product (in this case, potentially "mxtronics"). Look for a support or downloads section.

Official support for these generic controllers is rarely centralized. Technical communities and firmware archives are the primary sources:

Any sane person would have closed the tab. It screamed malware. But Leo was desperate. He clicked download, bypassed three browser warnings, and watched a strangely large 2GB file transfer to his desktop. ⚙️ The Awakening

Primary tools for chips using MXTronics controllers. Ameco / Micov MPTool:

Some devices come with software that can automatically check for and install firmware updates. Check if such a tool is available for your MXTronics device.