Legend of Grimrock v1.1.4 to v1.3.1 Patch

Description
This patch will update Legend of Grimrock from version 1.1.4 to version 1.3.1.
The update also fixes a couple of issues with the base game. Here is the complete change log:

Implemented Dungeon Editor and added modding capabilities.
Added a warning about unnamed prisoners to character generation.
Bug fix: mouse look does not work when standing in front of a wall tapestry.
Bug fix: when importing a custom portrait, the original portrait becomes “locked” and can’t be chosen for other characters.
Bug fix: on screen exp indicator displays an incorrect amount of exp when killing an advanced monster with level greater than 1.
Bug fix: no exp is gained if a monster is killed by Dismantler’s lightning effect or Icefall Hammer’s frost burst effect.
Bug fix: when the cube crushes a monster, monster’s death effect is played multiple times if the cube moves back and forth.
Bug fix: game refuses to start if the documents folder is mapped to a network location.
Bug fix: “Level up!” text above attack frames does not scale with resolution.
Bug fix: tooltips are buggy in 2560×1600 resolution.
Bug fix: exp is awarded to wrong characters if party marching order is changed before damage is dealt (e.g. cast fireball, reorder champions before fireball kills a monster).