I have already bought the vocaloid 4 editor and I already have Yuzuki Yukari Jun that I paid for. I'm trying to activate the Yuzuki Yukari Lin trial but when I try use it on the vocaloid 4 editor It says I need to activate it and put the serial number, but I didn't see a serial number anywhere in the files for the trial, and it wasn't on it's website???? Please help x.x