Who I have the same questioned this topic

I am also having this same issue.  I thought I would chime in to follow.  I was using Message+ the exe file until a couple days ago it stopped working forcing me to download Message+ through the Microsoft store.  I can send the messages through my computer, but those messages do not all show on my phone.  The responses from the recipient do not show on my computer.  

Anyone using another program?  I need something I can use if my phone is off.  I was using Your Phone, however, when I left the country, it didn't work.  I also tried Google Messages with the same issue.