Run the command to HOS_AlignmentToolsAlignment. You can create Alignments from Polylines.

Select the Polylines and check the result.

Run the command to HOS_AlignmentToolsPolyline. You can create Polylines from Alignments.

Select the Alignments and check the result.

The installer that ran when you downloaded this app/plugin from the Autodesk App Store will start installing the app/plugin. Or, simply double-click the downloaded installer to install the app/plugin. You may need to restart the Autodesk product to activate the app/plugin. To uninstall this plugin, 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.