I have tried to run LibreOffice 3.5.5 in "live mode".
(I've used the todo from the homepage)
I have used a SD-Card with write protection.
LibreO have startet from die write-proteced SD-Card.
But it was not possible to open existing odx-files.
And there was a error-message during quitting LibreO.
Are you able to tell us what the error says? This may help to work out what your problem is.
Also, does the error only appear every time you close LibreOffice, or only once you have tried opening an ODF?
Here the error-message when closing LibreO:
Fehler beim Soeichern des Dokuments file://F:/Data/settings/user/basic/script.xlc
(error when saving the document file ://F:/Data/settings/user/basic/script.xlc