Cant save files

Hi, I'm beginner completely and I have this issue, just installed the LibreOffice applications, everything was cool until I tried to save my document, when I select save as, the it sends me to the file manager so a can select where to store it, but it just shows me an incomplete screen where I can see half of my folders' names and nothing else. The version I'm using is 5.1.0
I don't have any trouble with any other window size, just with this one