another update:
Errors detected in the world object management.
This has been fixed.

More small performance optimizations.
Stability update. 

Known errors (new):
Inventory content is not always displayed correctly after the change of world:
1)No Inventory Object Graphic is displayed.
2)An incorrect Inventory object graphic is displayed, e.g.: an object from the world...

This error is very rare and its cause has not yet been determined.
This error does not affect the validity of the inventory objects. 
If, for example, the dragon flame can no longer be found in the Inventory, even though it has been collected, it is still present in the Inventory and can be  used.

To perform an Inventory refresh (does not need to be done), you must save the game (Sphere of Light or Location Change) and return to the title screen. After that select Continue Game and the hero stands in the middle of the collected objects.