If it is a NAND flash, then it's not supported. Nothing you can do, but to buy a new version of the programmer (TL866II plus).
The fact that the file is an UPG file doesn't really tell us anything. It could be a binary file ready to be programmed to the memory, a compressed archive, containing several files, an encrypted file etc.
My guess is that you ave a bricked device and you want to directly update the flash with the firmware.
Alexander.