Reduced image quality after upgrading on Yosemite

I’ve just upgraded to Libreoffice on my Macbook Pro OSX Yosemite Version 10.10 and when I view a text document, it looks like the resolution is significantly lower than it was in the version before I upgraded it. This includes the whole application (menu bars etc.). I’ve tried to uninstall and reinstall a previous version but for some reason I can’t. A solution to either fix the resolution problem or revert to the previous version of Libreoffice that I was on before, would be greatly welcomed.

Many thanks Neil