4.83 automatically downloaded

Forgetting that I had automatic update download enabled on my PS3 4.83 downloaded but I did not install it. Right now it's on 4.82 and when I try to run the exploit from the USB I am unable to select it because I am being prompted to run the actual 4.83 update with no option to use the USB even though the console sees it. So my questions are:
1. Is there a way to remove the downloaded update?
2. If not, is there any way around this?

Thanks,
AMNJ