There is a new version of Install Monitor available on the downloads page. This release contains several bug fixes and improved reliability and compatibility.
Some of the important changes are:
-Improved compatibility with the latest Windows 10 Insider Previews – you should install this build before upgrading to a Windows 10 Insider Preview 14942 or later
-Fixed condition where the product asks you to activate on a new installation
-Improved compatibility with Windows Store Apps such as Forza Horizon 3