When opening Diamonds in Windows via Parallels on MAC following error message appears:
Problem in TMainform.GiveAllMaterialsFromLibrary. Invalid URI: The hostname could not be parsed
Please disable Shared Profile in virtual machine configuration.
Or you can try unchecking Documents or/and Desktop options as some applications do not understand the path to Documents or Desktop folders if they are not default. When you are using Shared Profile path to your Windows profile folder are substituted with network paths to similar folder on Mac side for both OSes mutual integration.
See also: http://kb.parallels.com/6504