Although you can install more than one version of TestStand on a computer, only one version of TestStand can be active and run at a time. The TestStand Version Selector application indicates the active version of TestStand and can activate a different version of TestStand.

The TestStand Version Selector application, TSVerSelect.exe, is located in the <Program Files>\National Instruments\Shared\TestStand Version Selector directory. To launch the TestStand Version Selector, select Start » NI » TestStand Version Selector.
Note The TestStand Version Selector does not typically require administrator privileges to activate a specific version of TestStand on Microsoft Windows 10. To require administrator privileges for using the TestStand Version Selector, add the /reqadmin command-line option to the selector shortcut.

The Current Active Version control shows the currently active version of TestStand. Select a version in the Installed TestStand Versions control and click Activate to activate a specific version of TestStand. The Path to 32-bit Version and Path to 64-bit Version controls show the locations of the selected version of TestStand.

When activation is complete, the selector displays a message to indicate success or display any warnings. Click Launch 32-bit or Launch 64-bit to run the sequence editor application for the active version and bitness of TestStand.

If you activate TestStand and run a TestStand User Interface from a previous TestStand version, the user interface uses the TestStand Engine, step types, and components for the active TestStand version. User interfaces and sequence editors created with older versions of TestStand may not run as expected if a newer version of TestStand is active.