Tips:

Please Run the MSI Installer As Administrator.
Please Start Visual Studio As Administrator.
In case the toolbars of Inventor .NET Addin Wizard 2015 still don't show up in any editions of Visual Studio 2015/2013/2012, please run the INAW2015.vsix file directly from the installation folder, which is by default as "C:\Program Files (x86)\InventorNetAddinWizardPRO".
If the operating system is Windows 10, please following the steps as listed in VSIX Installations on Windows 10 to run the INAW2015.vsix.
In case the authorization code cannot be properly written, please start the Visual Studio as Administrator and try again.
In case any features do not behave as expected, please start the Visual Studio as Administrator and try again.
In case of some other issues or comments, please feel free to contact us at spiderinnet1@yahoo.com