Web Client:
The chosen new value formatting in Web Client Settings is not used for stamps at all at the moment. Only the Web Client language is relevant for formatting in stamps. Example: You are using the Web Client in English but your browser/system is set to Slovenian language. In this case the date format in stamps will be English (US) format always “04/29/2014”. This behavior cannot be fixed with a hotfix at all. It will be fixed in the next DocuWare release. As a workaround you have to install this hotfix and set your browser language to English UK.
Download Hotfix:
https://www.docuware.com/main.asp?sig=dlx&dwdblan=neutral&dwdbname=DW6.5_Hot18