You will find a post with a list of 50 "registration codes." You copy and paste them into Rundelete. None work. Why? Because modern software like Rundelete uses online activation servers. The moment a key is leaked, the developer blacklists it server-side. That "top" key was dead six months ago.
: Subreddits like r/software and r/tech can be good places to look for discussions about software and potential issues with registration keys. rundelete registration key reddit top