Playonlinux problem

I'm using Ubuntu18.04. I followed all the instructions on how to install Playonlinux and everything went fine. However, when I open up playonlinux and click on install, the screen I get appears to be not big enough to see everything and I can't see the "install an existing program" menu box. Also at the top where the icons are, I can only see a partial icon that appears after "others" and the four leaf clover in the bottom right is only part there. There is nothing there to make the window bigger to see everything. Any help would be greatly appreciated.