It seems that the default text color has been set to yellow. Not sure how this happened, but you can fix it by:
(1) Opening the vizx file in EnviroInsite
(2) Select the tab Argos:1
(3) Select View -> Options from the main menu
(4) Go to the Options tab in the dialog box.
(5) Set the Default Color for Text to Black
(6) Click on OK
(7) Save and close the file (File -> Save and File -> Close)
(8) Reopen the file in EnviroInsite. Select File -> Open and select the vizx file.
