A ".bin" or ".dat" file inside a archive is a "dump" intended for a hardware programmer (like the RT809H or CH341A), not for a USB stick update.
Connect the programmer to the chip (using a clip or by desoldering).
: Contains firmware for various DOFFLER models using the CV512H-Q42 chassis, uploaded by experienced users.
Always save your original "broken" dump before overwriting it. Erase the chip and write the new downloaded file.