McAfee Stinger Portable 12.1.0.3034 installs Real Protect on host

Yesterday morning I ran McAfee Stinger Portable 12.1.0.3034 from my flash drive to scan my desktop machine and today I see mfevtps.exe running on my desktop machine. It appears this version of Stinger is not truly a portable-app and installs McAfee's Real Protect - "a real-time behavior detection technology that monitors suspicious activity on an endpoint." Is there a way to fix this so nothing is installed on the host?