On October 22nd 2018 Avast and AVG published a faulty update to their virus definitions file which resulted in any website that contained a page named login.php to be erroneously blocked as being infected with Chase Bank phishing malware. This impacted numerous sites on the internet and while we did not receive any customer reports we believe it may have impacted users of Quantity Manager who used either of these programs. This has been resolved with the latest October 22nd virus definitions. At no point in time was Quantity Manager infected with malware.
For more information see the AVG community thread https://support.avg.com/answers#!/feedtype=SINGLE_QUESTION_DETAIL&dc=All&criteria=ALLQUESTIONS&id=9060N000000gCjvQAE