I want to get rid of the "Try Acrobat Pro DC" sign.

So the "Try Acrobat Pro DC" sign appeared on top of my page. I have a very small laptop and I use the reader on half of my screen. This sign is taking so much space that it is not impossible to navigate my pdf files while working with one click. How can I get rid of this sign? If I sign up for the free trial, will it go away later? If yes I will do that because I am fed up with this and looking for other pdf softwares.