If you have installed .NET Framework 4.7, please be aware that some Autodesk applications are crashing after using a command in the Ribbon. In order to keep this from happening, you may want to make sure the .NET 4.7 does not automatically install via Windows updates. If it has already been installed, you may uninstall the .NET Framework 4.7 from Programs and Features if using Windows 7. If you are using Wins 8.1 or 10, you will have to uninstall the entire Windows Update, .NET Framework 4.7 update.
See more information HERE