Kamikadze,
It is most likely false positive. You could always verify smaller files (up to 50MB) on jotti service where they use 19 different antivirs (
https://virusscan.jotti.org )
paint.net.4.0.10.install.zip
Size: 6.69MB (7,019,951 bytes) Type:Zip archive First seen: July 10, 2016 at 8:28:49 PM GMT+2
MD5:36f477a1ef92fe6fd307707888141ab3
SHA1:f5127a6b4ae907249c830d6bd2cb7481953e962f
Status:Scan finished. 0/19 scanners reported malware.
Scan taken on:August 21, 2016 at 8:46:39 PM GMT+2

Aug 21, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 17, 2016
Found nothing

Aug 21, 2016
Found nothing

Aug 20, 2016
Found nothing

Aug 19, 2016
Found nothing
Regards,
Piotr