OnyX Update Fail HELP.

I tried to update OnyX, and it froze trying to download the update.
I force quit it to try and resolve the issue.

Fine, I expected the partial download to stop at the same time I quit OnyX.
But, I find unexpected network activity, and the file is still increasing in size.

The file is apparently still downloading, best guess is OnyX made a call to cURL or something.
How do I tell whatever process is downloading the file to STOP?!

UPDATE: I couldn't figure it out, so I just shutdown the machine to kill whatever processes were running.

Still, I'd like to know exactly what to do if a called process is still doing something after the application that called it froze, requiring a force quit.

I'm still fairly sure OnyX called cURL to download the update, and a shutdown seems a bit of an extreme resolution.
Activity Monitor said cURL was executed by 'root' so I wasn't sure whether terminating it was safe to do.