I may have been unclear in how I phrased that. The browser extension ended up reinstalled along with all my other plugins when my Firefox profile came over through Firefox Sync.
The bit that you install via the command line did not come over because I forgot to download and re-run the command line installer on my new machine. So I had half of Timimi installed – just the browser extension, not the native utility.
What I can’t figure out is how you went a whole month without noticing.
Like I said, it was mostly just journal entries. I’d open the wiki, write the journal entry, close it, save the wiki, and assume it was still there. The vast majority of this very large wiki was still there, and I don’t usually pop open and re-read journal entries I’ve recently saved.
But if it’s been saying “saved” then all your data has probably been saved as snapshots in your downloads directory.
That would be nice, but sadly it has not. My downloads directory is small and clean and lacking in tiddlywiki files. That would have told me something was wrong, in any case, and as you say, would have saved all the entries (in a series of files which was a copy of the wiki with one additional entry per save.)
What really surprised me was that Timimi went through the motions of saving, nothing saved, and there was no error message. I would have expected some kind of error message.
Maybe there is something about my peculiar situation, with the browser extension reinstalled automatically thru Firefox Sync, and the native extension installer not run on the new machine, that caused this all to happen with no error message.