Dear people at intfiction.org,
I wish to warn you in the hope you do not suffer the same loss I suffered. I noticed I had an old version of Twine, and wished to update. Well, let’s say that if you install a new version of Twine it overwrites the old. And, most importantly all subdirectories. In the end I managed to lose the ‘backup’ and whatever was in the ‘stories’ directories.
I’m not sure how to update without installing a new version yet, but I should advise you to save your work immediately prior to updating Twine, and to save it somewhere else.