Save and Save as… do not work anymore

The functions ‘Save’ and ‘Save as …’ do not seem to do anything, there is no dialog window with the folder list appearing.

Solution

1. Close Diamonds
2. Go to the Desktop
3. Click once with the right mouse button on the Diamonds shortcut
4. Go to ‘Properties’
5. Tab ‘Compatibility’
6. Make sure that the option ‘Disable visual themes’ is NOT checked
7. Restart Diamonds.