The best way to fix a grayed-out TRW Design Wizard® icon is by modifying CorelDRAW, which will re-write and repair the program, including any macros that have been installed
Modify CorelDRAW by going to your computer’s Control Panel and select “Uninstall a Program” in the Programs and Features tab
From this list, you will need to find your version of CorelDRAW and select "uninstall/change"
This will take you to the modify screen and allow you to amend the program
After modifying, be sure to re-run the TRW Design Wizard ® to make sure the macro has been properly installed