Problem with Purchased Version

Hello,

So, I bought Neutron like in 2015. Use it on 3 devices, all tablets. The oldest tablet is just a music player for the bedroom and plays all the time. The other morning I wake up to no music and when I go to restart it (thinking it was a simple crash), it pops up a nag screen telling me my trial has expired. I will reiterate that this is a purchased copy and the tablet has been running this special installation for about 9 months, pretty much non-stop.My other devices are fine, no issues. But this one, I've even done a hard reset on and deleted the NeutronMP folder from my SD card. Done this a couple of times, all while being connected to the internet for 20 minutes or longer after deleting all the Play Store cache and data (as per the nag screen instructions). I can load the play store and it says I have a purchased copy, and I install it from there, and still, it trial errors.

Please help.

I didn't find the right solution from the Internet.

References:-
http://neutronmp.com/forum/viewtopic.php?f=3&t=3865
[url=https://blog.advids.co/20-brilliant-clean-energy-solution-video-examples/]Clean Energy Solution Video[/url]

Thanks