Thank you for clarifying. Loading a single model that has been saved in a group is not supported in Code Control as it potentially has references to the other models. If you want to change something without too much manual labor you would have to load all models that were saved in that group, make the change, and save them back to ModelBlobs. You could query the ModelEntry from the ModelBlobs as you are doing in your example, manually go through the XML (using the XmlDocument class), change values of properties and serialize and save it back into the ModelBlob. Note that this has not been tested as Code Control is not designed for this use. Thank you again for clarifying, I hope you will get to a solution.