With Invision Community 4.4 this plugin is mostly no longer needed! Go to the Admin Control Panel - Members - Profiles - Profile Settings Tab, scroll to the bottom of the page:
Set that to global and save. That will add group formatting to user links to 99% of what this plugin did years ago...
So what does this plugin do now?
This plugin just looks for the edge cases that new internal setting misses and tries to patch them up. Some are doable, others not. It now covers:
Profile page header and member hovercards.
Messenger conversation participants block.
The messenger sidebar area is more or less out of bounds for name formatting. Those names appearing there are not template-output but constructed via the underlying messenger methods and are inserted into language strings directly. It could be done but honestly its way way too messy and not worth anyone's time.
Forum posts member info sections.
{member='name'} Template Output Plugins
These are shortcuts in templates that allow the template author to kick out a single member variable. Version 19 of this plugin now has a setting that will allow you to format these specific instances universally. You'll likely notice it firstly in the usermenu at the top of your community where your logged in name appears. If this, or any other newly-formatted name showing up somewhere is not to your liking you'll need to leave this setting off as this is applied to every {member='name} instance and cannot be filtered or targeted to exclude apps or sections of applications specifically at this time.
Be sure to hit the plugin's settings in the ACP before using it!