Hi,

The ModuleCatalog class would be still present in PRISM 4.1. You could find it at the following namespace on the Library:

• Microsoft.Practices.Prism.Modularity;
  

In addition, you can find the same class description on the MSDN site:

• ModuleCatalog Class
  

I hope this helps,
Regards.

Gabriel Ostrowsky
https://blogs.southworks.net/gostrowsky