Just start the Symbol Lib. command under Annotate tab, CodeSystems panel:

And select the symbols for copying them into the target drawing. If the symbol library and target files are DWG files you can insert also AutoCAD Blocks.

Please refer this link for detailed information and usage instructions, https://meksystems.fi/wp/autodesk-apps/drawing-symbol-library/.

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 can unload the plugin without uninstalling it by unchecking the "Loaded/Unloaded" check box associated with the plugin in the Autodesk® Inventor® Add-In Manager. You may have to restart Inventor to completely unload the application.

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, you can uninstall it from 'Control Panel/Programs and Features' (Windows 7/8.1/10/11), just as you would uninstall any other application from your system.