ActivManager CRX for Chrome is a free Education extension. This extension is developed and published by Promethean Limited. Find, Download, and Install the latest and old CRX versions from here.
Promethean ActivBoard Tools.
ActivManager allows ChromeBook users to list and calibrate any compatible ActivBoards or ActivPanels they have attached via USB. Compatible devices include ActivBoard 6 Touch, ActivPanel (v2, 3 or 4) and ActivWall.