Hello,
ClamAv finds the fidler installation (fidler4setup.exe) as a virus: ClamAV Win.Trojan.Kazy-2656
virus total link: https://www.virustotal.com/en/file/be33d6d0381c22355c0c6cab60aa518bd334e5bcca7107a829aeb784b56b1d97/analysis/
I've submitted the file as a false positive at http://www.clamav.net.
Regards,
arik@odi-x.com