Moving to TestCentric 2.0
NUnit 2.0 through 2.7 was delivered as an all-inclusive package: test framework, console runner and GUI runner. With NUnit 3 that changed. The framework and console runner became separate packages and the GUI was no longer developed.
TestCentric .NET 8.0 Pluggable Agent
Now that the .NET 8.0 preview is out, many folks will want to experiment with it and possibly run tests under the TestCentric GUI. A newly released extension, the .NET 8.0 Pluggable Agent, makes this possible.