Hi Bruno, thanks for the input! My settings were already set as you specified. The problem is not that parameter values do not save on a patch change, but rather that they do not save when I close a concert. For example, I will have the feedback on a delay set at 15% when I open a concert. I will change the feedback to 50% and save the concert. When I open the concert again, the feedback is at 15%. Everything else has saved fine, but the values of parameters doesn't save. Thanks again!
Ok it may be something else then.
I'll give you 2 options to try.
Do not connect any midi interface (controller) so that the Mainstage not assume values from that controller
create a new template with only one or two parameters which can test with different values and save (see if the new values are saved), but may be some error in your template.