Comment 73 for bug 992807

(In reply to comment #43)
> If I do so I shall uninstall the version provided by the Software Centre.

Yes. Uninstall the existing version (you don't say which distribution or version of Linux you are using). Then follow the instructions on the Libre Office download page and use your package manager to install from the terminal. It's pretty easy.

If you still have problems, this isn't the place to ask; instead, ask on your distribution's help forum, or on a generic Linux forum.