Remember what I said about downgrading to Miku's V2? Well that's not happening. (NOT BAD NEWS, READ FURTHER)
I logged into my Crypton account, and my serial was there! So now I can resume making cruddy Vocaloid songs! This took some troubleshooting, but I found the way. ChanChanP's Vocaloid career shall go forward! By the way, the product I lost was Hatsune Miku V4X. A REMINDER TO THOSE WHO LOST THEIR SERIALS! Check your emails and/or voicebank accounts!