Very fair to point that out. I don't know why this happens. I re-checked and by now it's only 9 warnings. I don't recognize any of the 9 antivirus software names that flag it (besides ClamVM which I know of because it's open source and "McAfee-GW-Edition" which I only know because of the name "McAfee".) The "normal McAfee strangely does not flag rpaExtract.exe.
In the end, it seems like false positives.