Latest Prezi appears not to have saved any changes in local file/s on desktop, 2 weeks work deleted. After duplicating original file for safety precautions before opening in Prezi, as expected new changes made a mess so went back to duplicated file to find that ALL the edits made since working in the newest version of Prezi had not been saved in the file. Going back in time machine to older 'versions' of file over the last two weeks reveals that NO edits made since using new version have been saved locally ! Despite only working on the file locally. All work seems to have been lost.
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