@Packers1958 so I tried this and want to make sure I did it right. I downloaded the Messages+ app to my phone. Added my mobile number and turned off iMessages. I waited for some messages to come into the Messages+ app and deleted them (my old messages I got in Apple Messages prior to installing didn't come in). I then deleted the app and turned iMessages back on.After deleting all the texts off their server, I went back to using the Apple Message app. All the messages arrive without issue in the Apple app.
Did I do this correctly? Is there a "turn off" or logout of messages+? I didn't see that option. TIA.