I’d like to associate myself with the OP’s question.
I have the same problem, just with firmware for different series of mcu (stm32g0 and stm32f7).
Attempts to download the firmware via the sw4stm32 interface in Eclipse fail and leave files with names like “.tmp_STM32FirmwareInstall_*”. (See attached pic).
I also tried downloading the firmware (for the stm32g0) from the st website to place in the relevant location but this hasn’t proven to work. (See attached pic).
Any advice is appreciated.