[@ian] I emailed Watchdog Anti-Malware support and here is their response to me:
WatchDogDevelopment.com, LLC is an American company that markets Watchdog Anti-Malware which is a rebranding of Zemana Anti-Malware for the North American market.
Zemana Ltd., based in Turkey, has traditionally struggled to capture North American market share, and recognizing a tremendous growth opportunity we struck a unique deal with Zemana to exploit and push the technology under a more North American friendly label with local expertise to increase market penetration.
However, a license key for Zemana Anti-Malware will NOT work in Watchdog Anti-Malware and vice-versa.
Hope this clarifies things.
Kind Regards,
Watchdog Anti-Malware Support