The date format in the Diamonds.ini file is incorrect:
- Close Diamonds.
- Go to ‘My Documents’ > ‘Diamonds’ folder
- Double click the file ‘Diamonds.ini’ to open it (if file extensions are not visible, the file is simply called ‘Diamonds’)
- Change the date format in the upper 5 lines into dd/mm/jjjj
- Save and close this file
- Launch Diamonds