A serious bug was hidden in the I/O core for months.
Under certain circumstances, file access has not been terminated or started correctly. This led to incorrect graphics content and other problems, such as constantly increasing memory consumption, under certain conditions. These problems occurred so rarely and only after a long, repeated game run that the error has not been discovered to this day.

This error has been fixed with this release.
Further smaller fixes on the engine.

Content:
Changed the volume of various sounds and sound effects.
Replaced various sound effects.