Have you tried different resolutions? (
'Couldn't create renderer')
In Vista / Win 7 the configuration xml file is in the folder below. It can be edited in Notepad, or any other text editor.
C:\Users\ %username% \AppData\Local\Divinity 2\Profile
or for anyone else with XP
C:\Documents and Settings\ %username% \Local Settings\Application Data\Divinity 2\Profile
You may need to set Windows Explorer to show hidden files and folders.