Instruct: Classify the given review into positive or negative sentiment.
Query: can't register; says invalid serial number (bought at Target!)

Should have 0 stars. I just bought Anime Studio 5 at Target yesterday. I wanted to use it to make animations for use in my classroom. Unfortunately, when I entered the serial number on the sleeve, the program said, "invalid serial number." I tried many more times to enter the serial number, in case I'd made a mistake. I got the same error message. So there's 50 bucks down the drain. Can't return opened software to Target, of course. What a rip off! Ironically, I was able to register it via their website, with the given serial number. Still, it only wants to run the trial or I have to "buy" it again.