I tried to download Winflows, but it gives me an error when doing so. Also, on the official website, the product appears to be available although no information on how to perform in-depth configuration is provided, but they do have a contact option that you can use to ask for directions and to see if you can add other models in the program's database.
Also, I've seen that you can use the Export and Import function. If by models you refer to the files with the data, then yes, you have the possibility to add them into the application. I've seen that when that function is accessed, multiple options are available to configure.