The Windows 10 anniversary update 1607 will cause the tracking to be off from the aimpoint with the DF Driver if you are not running the latest version of the Smokeless Range with our fix. To check to see if you have the latest version open the Smokeless Range and click on the help question mark. On the help screen click on check for update. This will close the Smokeless Range and check for updates.
http://windowsreport.com/remove-windows-10-anniversary-update/
Thanks and please contact support@calibersimulation.com if you have any questions.