Other users in the steam version have reported also this. The in-screen text freezes and you can't advance anymore when Galilean brings the airplane plans.
I don't know if I'm the only one that have advanced to that point in the game, but I'm more annoyed by the time I spent reaching that point in the game than the waste of money.
If the devs don't have any plans to update the game, I think you should be warned before buying.

Well, after the last patch, the game breaks after the conversation with Galilean, instead of before, I have gained a full minute of pay after two months!!!

This fixes the game post here if it works.https://steamcommunity.com/sharedfiles/filedetails/?id=1951882111