The terms and "preactivated" refer to specific modifications often sought by users for convenience: What is the "Virtual DJ" software? - AlphaTheta Help Center

The Atomix Virtual DJ Pro 7.3 Final Preactivated Portable version is a culmination of years of development and feedback from the DJ community. Here are some of its key features:

It provided native support for a new generation of MIDI controllers that are still found in some home studios today. The Risks of "Preactivated" and "Portable" Versions