Several problems that came with the last OpenOffice release have been solved.
If you have installed an eLAIX version 3.0.0 or lower, remove this version first by opening the installer document and clicking "Remove eLAIX". In case you can't find the former installer/deinstaller locally, you can download it here. Please ensure, that you have macros enabled in the OOo-Preferences, before you try to remove the old eLAX version.
Note: You should install the Writer2LaTeX extension in order to export formulas. Download at http://writer2latex.sourceforge.net/index6.html.