When you run the command name WS or WaterSupply, the Scale dialog will show the first time you run the program on the current drawing. After you specify the right scale of the drawing then the main dialog will appear immediately. You can see the preview of this main dialog in the screenshot. All you need to do is to choose the desired layer name from the list.

The 'Scale' button changes the scale of the PPR Water Supply Pipes & Fittings, if you have chosen the wrong scale from the first dialog that appeared at the start of the program.

Finally, you can hit the Activate button in the main dialog box to get the permanent full version of the program. Follow the steps from the dialog that appears right after hitting this button.

The installer that ran when you downloaded this app/plug-in from Autodesk App Store will start installing the app/plug-in. OR, simply double-click the downloaded installer to install the app/plugin. You may need to restart the Autodesk product to activate the app/plug-in. To uninstall this plug-in, exit the Autodesk product if you are currently running it, simply rerun the installer, and select the "Uninstall" button. OR, click Control Panel > Programs > Programs and Features (Windows 7/8.1/10/11) and uninstall as you would any other application from your system. 

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