When I create a track in Acid Pro 10, using synth plugin DN-e1(64) and select a sound, then close the app and reopen later, the synth will reload, but the sounds I originally picked for the various tracks are not the same. It is as if the program, even though I save my work, does not remember what I have chosen. I am new to MIDI usage. Please help. Thanks in advance.

I am using Windows 10