Can I ask you which way do you use to upgrade between ampps versions?
For example I have to upgrade from 2.5 to 2.8, I usually make a backup of websites, db and config files.
Then I copy them over the new installation and it usually works but I am not pretty sure it is the correct way.
It would be good if AMPPS itself would be able to upgrade to the new version when available. Or it would be good if an update upgrade procedure description would be available on the wiki.