GOOD NEWS. . . . The PICTURE UPLOAD FUNCTION IS WORKING !!! The tech folks at the parent company have been able to remedy the issue. You can upload pictures once again. Thank you for your patience.
Speedout might work, but if you don't have a drill I recommend a regular vice grip. Harbor freight has plenty.
I have removed countless round screws like this. Just bite down 100% vertically and apply a lot of pressure. Set the vice very tight, but not so tight that it slips off immediately...