I think you need to have a non-guest user account to download simulator, or an account which is still a customer with NetApp.
Note: If you are not a netapp end user or does not own a Netapp device you can create a guest user in support site but the Guest' access for the online support site is restricted to basic product documentation. This level does not allow access to any support tools. To download support tools you need to be either have these kind of account NetApp Customer / End User NetApp Re-seller / Service Provider / System Integrator / Partner. https://community.netapp.com/t5/Simulator-Discussions/Download-link-for-NetApp-Simulator/td-p/122566