Nov 23, 2015 - 03:08 PM
You can review a detailed answer here
But to answer why all of a sudden, and not before because Anti Virus are updated daily with new detections, in addition an app that we haven't pushed out in a while may collide with the new exceptions. For example we haven't updated the dashboard app for half a year, and on the last release we did, the dashboard app had some words inside of it that the anti virus designed for personal use is triggering and all of a sudden it is considering it suspicious.
We recommend that you review this post and make exceptions or upgrade your anti virus for a business version.