I have been using LibreOffice since Xmas, now it won't start. I think something chunked with my attempt to edit a PDF file. I have removed and reinstalled it from Ubuntu Software Center. The center says it's there but nothing comes up. I have deleted it and attempted to reinstall it with apt-get, again nothing. Removing everything that has "libreoffice" and reinstalling it does not work. I tried to install LibreOffice 5.0 but still nothing. Help!
Have you tried using synaptic package manager?
sudo apt-get autoremove libreoffice --purge
to completely remove it from your system, all traces,
then try reinstalling it with synaptic or apt-get
sudo apt-get install libreoffice