Morning, Thanks for the quick reply. It was a bit early this morning that I posted so sorry for the confusion.
I woke up this morning and tried to do the downgrade from the portal and applied the 4.9.0 version since the 5.0.16c version isn't listed. It actually worked! I then ran admin launcher and it told me that it wasn't compatible with 5.0.16 admin do you want to upgrade? I said yes! It upgraded to 5.0.16! I then restored my backup and I hope all is good again.
Yes I was running 5.0.16c before I attempted the upgrade device from portal. Yes, it appears that I do have the 300 series board :(.
Just to understand, I am stuck here with this version? I have to purchase a new hardware, polsy I believe, to upgrade? It appears that the upgrade to a new hardware is ZWave compatible even though it still states testing?
Kinda sad since I have homekit and other things working.
Thanks.