Easy way to fix "cannot create GdkGL" GtkRadiant error

[Redman]

I see some people have this problem, but don't found way to fix it. I post here how to repair it.

1. Delete C:/Documents and Settings/username/Application Data/RadiantSettings/1.5.0/trem.game/local.pref.
2. (if first don't repaired) Reset all GFX Card settings to default.
3. Run GtkRadiant and set all settings, because old was deleted.

Post here if this helped.

[Odin]

GtkRadiant does have an option to clean all preferences on startup if this occurs.

[Bomb]

You seem to have supplied instructions only for Windows.

[Death On Ice]

You seem to have supplied instructions only for Windows.

It's only happened for me on Windows, never Linux.