For a long time, VirtualDJ offered a one-time purchase model. Now, they have shifted toward a subscription model (often around $19/month) or a steep lifetime license. While this may seem expensive for a hobbyist, it is the cost of doing business if you intend to release your mixes publicly.
: In the Options tab, use the search bar to type "logo".
The logo is a watermark placed intentionally by Atomix Productions to encourage purchasing a license. Removing it without a valid license may violate the software's terms of service.