Ah, bugs happen. ;) I've loaded an earlier save game and I made a different dialog choice, which made the game work again. I'll try to find which exact save it was (I'm at ~100 saves by now), and attempt to re-create the exact situation.
As soon as that's done I'll send you a link to the saves and tell you which ones you may want to look at.
There were a few other (minor, non-blocking) issues, which I will then report too. :)
Unraveling the mysteries in this game is quite fun actually. By now, I managed to complete my research (fully, as far as I can tell, including detailed information provided by a certain someone). But I'm still too curious about what's behind that iris door.. ;)
Also, it's interesting that I could reach the same ending twice, but how I got there was wildly different, especially early on. That was a nice surprise!
I'll send you a message about the saves soon!
Thank you!