Thanks for all the effort put in! It looks like it works. There is just one strange thing:
I don't remember having wounded dwarves in the fort at that time. Maybe all the healing disappeared? Moldath is very free and very a mess again. Judging from the scars, the heal was completely ignored.
My theories on why it happened:
* I used autosave, that is to say I retired directly after an autosave. I have no idea how
that could revert a site or not remember it, especially since
it's the site that is retired, but it may be possible this was the problem.
* Maybe something in the "current" folder remained cached and crosswired with the good save? Again, I see no reason why this could happen, but there it is.
Another thing is the inconsistency in fortress members: the game remembers they existed, their deeds etc. but forgets they were healed. Also my artifacts don't appear in the L menu, only
Moldath's. I'm returning to the theory that Moldath went Deadpool on my save. XD
The best news as far as I'm concerned:
* My named reptile woman is still there
* The diamond pedestal is still there
* There is now a clear glass wall that shows the pedestal, so visitors may admire the reason the site was founded right in the center of the map
Some more good news:
* The roads and walls are there
* My modification on the cave actually un-mudified them, so that's great.
I looked through Legends Viewer for new events, none that I can see. Apparently NGN didn't have time for a fortress, a shame.