[Observium] new alert checks?

Hi, I am currently using the current ce version (Observium CE 18.9.9420).  After upgrading from the previous ce version, i see the alert checks have completely changed. the alert checks i had still seem to function, but when I try to modify them, the fields are all different....I am getting the impression that there is an alert conversion script?   I have looked for docs on how to use the new alert checks but cannot find any.  Can you please point me to a page that explains how to use the new alert checks and how to fix the upgraded alert checks.

thanks!

Tony