If the License Tool was installed as part of an arivis installation, the easiest way to access it through the Windows Start menu > Search tool:

Alternatively, it can also be accessed through the Help menu.

If the software can't be opened because of licensing issues, or if trying to access the License Tool on a computer where Vision4D/arivis Pro is not installed (e.g. server machine),  it can be accessed by navigating to the application within the Windows Explorer. 

If the License Tool was downloaded independently it can be found wherever the ZIP download was extracted. Otherwise it can be found in the software installation path (typically C:\Program Files\arivis Vision4D\LicenseTool\arivisLicensing.exe).

Once opened, the License Tool should look something like this: