No, they're not "sub versions", they are separate versions.
7.0.0 is one distinct version. 7.0.1 is the next version. 7.0.2 next, and so-on. These numbers are usually talked about in terms of "major", "minor" and "point" releases.
A major release usually represents a massive structural change (or a major rebranding exercise in some software). A minor release is usually some improvements, new functionality and often changes to existing functions. A point release is very rarely anything more than bug fixes or minor enhancements that don't change the shape of the database or functionality.
As a general rule, you should choose the latest point release for the major.minor version you choose.
In your case, you should upgrade to 7.0.latest, then, as that's out of support, make a choice to go to 7.4 or 7.5 (again, use the latest point release)
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
We're bringing product updates and pro tips on teamwork to ten cities around the world.Save your spot