OpenOffice and LibreOffice are free open-source Office/Productivity suites – competitors to Microsoft Office. ClaroRead for Windows PC works with both of them for highlighting and reading back in their word processors. However, if you have both installed on your system, then one them may fail to work. This is because the programs were the same program until very recently, and they conflict at a system level if both are installed.
Uninstall one of the suites and reinstall the one you want to use to make sure ClaroRead works with it.