Retrain Neural Network with Matlab as Standalone application

Hi, I use Matlab neural Network toolbox to create a neural network for electricity load forecasting. The client for whom I do my work doesn't use Matlab. Now I have the two following options to create an application with Matlab compiler for him: - Use genFunction to crate a function of the trained neural network. - Make a function which trains a neural network. My question is: Is there a way to retrain a neural network in a standalone application and use then the new created network for the load forecast? The problem is that Matlab compiler doesn't support the export of genFunction. Is there an other solution to have access to a retrained network in a standalone application(Excel add-in)?

Thank you in advanced.