i think, 2.8 would not solve your problem.
May be describe more detailed, what configuration does not work.
It looks like the entire network has stopped working. I just downgraded to 2.8.28 but the back-up I have did not re-set-up the firewall.
What I have is an AP going to the MT pc with RouterOS on it using the Hotspot feature. but the firewall setting have to be re-set which I am not that good at.