I am trying to find an app "Comment a build" that was available on v6.7 but not in v6.9
Wondering has this been renamed to something else or completely removed this plugin? thank you
If you are referring to Build Comments task for Bamboo, you could get in touch with the plugin vendor from https://marketplace.atlassian.com/vendors/1214658/cintia-dr asking to publish a new version or bump the plugin version or Atlassian Marketplace.
Perhaps, you could make use of Working with comments bundle feature at some extent, whilst the 3rd party plugin is not updated.