After the installation, the "Spline check" will be available under "Modifier Stack" in 3ds Max.

• Select a spline,
• Apply Spline Check from the modifier stack,
• The diagnostic information will be available immediately.

After downloading the SplineCheck-X.X.X-Installer.exe from the app store, double click on the exe file and follow the instructions to install the application.

To uninstall this plug-in, exit the Autodesk product if you are currently running it and click Control Panel > Programs > Programs and Features (Windows 7/8.1/10/11) and uninstall as you would any other application from your system.