The CAM2 measure 3.92 software is made to stand alone. Therefore, when trying to install a newer version, the older version should be deleted along with the 2 FARO directories first. You might succeed in installing both but if you have both installed you will be subject to random errors and stability issues.
See linked attached document for information on how to uninstall and install this version.
Click here to download: Uninstalling/Installing CAM2 Measure Version 3.9x
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