Update 5:

Fixed an issue where the letter opener could not be identified. We also made a small improvement to the general identification calculation for the process to be more reliable.
The way we calculate how a treasure is being displayed when digging it up has been changed, and all items should now show correctly in the hole.
Fixed the issue where missions/jobs were not available beyond Bavarian Lake. This issue only affected the German version of the game.
Some typos have been corrected while at it.