Apple provides a special Mac Books with Retina display. All applications have to be updated to work correctly with new high resolution screens. Otherwise, Mac OS just multiples pixels (instead of one there would be four). Thats why software without updates looks ugly.
Visual Paradigm is awesome =) but this issue makes me cry.
Could you please update your great software?
P.S. JFY https://developer.apple.com/library/mac/#documentation/GraphicsAnimation/Conceptual/HighResolutionOSX/Introduction/Introduction.html
Please follow the article below to enhance the font display on MacBook Pro’s retina display. We will keep enhance the icons and the turn up the UI in the future release.
You are welcome. Feel free to post again if you have any questions.