Look underneath that chip. If it has a little square chip on the bottom it cannot just be overwritten. If someone has already returned that ecu to stock, then it's possible.
Those risers are notorious for failing, best bet is to desolder the entire mess and return it to stock.
I believe there is a little chip underneath. I was able to read it and download it but I was about to flash it and I got a warning with Nef software saying it couldn't read a block and something about erase or ignore or cancel so I just stopped there and thought I might ask here. It is still flashed with Giac and car spikes about 17-18 but not rear o2's coded out or EGT's and I wanted to load my own file. Any help would be great. Thanks guys!