I too do not have Samplitude Music Studio, however it looks like you are running the trial version, in which case, like other Magix programs, and by inference from the Samplitude Music Studio web page quote:-
. . . . 'A free trial is a program you can download for free and use for 30 days. If you decide to keep working with it, you can buy the full version' . . . .
@Anton-Kaptsev Ok, version X8 of Samplitude Music Studio changed its code base to Samplitude Pro X8. So, it looks like you've got the Elastic Audio Easy instead of VocalTune, but the Elastic Audio is, in my opinion, more feature rich than the simplified VocalTune.
But it's definitely something wrong with the button name and the website. I recommend you contact customer support at proservice@magix.net and tell them about this.