Personalized settings go back to default settings

The bug:

Personalized settings (skin, language, video settings, keyboard & mouse settings, audio settings) reset to default settings when the game is correctly closed and re-opened.

Steps to reproduce the issue:

1. change the default settings to your preference: now you have personalized settings (skin, language, video settings, keyboard & mouse settings, audio settings).

2. play, then correctly close the game.

3. re-open the game: your personalized settings are back to default settings.

Expected result:

Personalized settings should remain saved when you close and re-open the game.

Actual result:

Personalized settings are reset to default settings when you close and re-open the game.