Installation for Navisworks
The viewer for Navisworks is fully installed by the main installation, and available via the tab Add-ins > BimSens or DataView > Window > BimSens.
If BimSens is not accessible or not the correct version after you followed the installation procedure, it could come from an issue with the Navisworks Version (Manage, Simulate, 2014, 2015...) VS BimSens's Navisworks Viewer version. Run the installer.exe again and make sure that you have selected the correct versions during installation.