Evo-Gen means that the file is marked as suspicious and actually its clean.
https://www.virustotal.com/de/file/7546ea382fce6f3c9210157cef23adfd2be813cf7a435419227342e60ad84ac3/analysis/1383769892/
Please use this form to report it as false positive: http://www.avast.com/contact-form.php