Then,select the TCAD Package for Borland Delphi&C++Builder Item in Design packages,and press "Remove" will shows a confirm,press "Yes" to remove it.Press "OK" to Close this Project Options form.

Last,delete the library path.

a. Select Tools|Environment options,it will show a dialog. 

b. Click the "Library" "..." button after Library'll show a new dialog. 

c. Choose the TCAD package folder in Ordest list of Library "Delete" button.Press "OK" button. 

d. Press "OK" to sure delete the tcad library path.