It is not downloading anything when it runs, only checks to see what is there.  You can disable the check per workstation at Settings - US-A.  it only downloads if you actually run it at SM-V.

This might be related:
 
There are times when EVO slows down considerably, so I open up my task manager to find the EVOPATCH process to be utilizing a considerable chunk of my network bandwidth (see image). This isn't an issue for hardwired Gigabit users, but becomes a problem for users with wireless only access. I've seen the bandwidth increase for EVOPATCH when I'm in the IN-A/B or BM-A/B menus. It doesn't seem to be linked only to logging into EVO.
 
I assume SM is system manager? If I don't have access to SM-V, can I grant it locally? I only have access to system manager IM or TAS.
 
http://postimg.org/image/hyxd0id0n/