During startup the plug-in checks the existence of a LXStair property set and creates this definition if missing. 

After launching, the LXStairSolidAdd command use this dialog box to specify stair settings (name, layer) and parameters (riser, tread, landing, width and slope) and draws the staircase by specifying the start point and direction.

Existing staircases can be edited with the LXStairSolidModify command. Use the dialog box to adjust settings, parameters and geometry (position, rotation). The stair will be updated after you click the OK button. The stair can be also selected first and a right mouse click "Modify stair"also opens the dialog.

You can see a list of all stairs and their parameters by launching the LXStairList command. 

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/plug-in. 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.

There are no design checks implemented yet, it's in the scope of the user to define reasonable parameters.

The standard setup is for metric drawings, you can easily change the standard values in property set definitions and add them to your own templates.

The plug-in only checks the existence of the LXStair property set definition, but not its validity. Removing properties from the definition can lead to malfunction.