In a previous post I gave the links to the settings. You did not mention which version of the program you are using so I will repeat BOTH again:
In CSB5,
you can change several settings in the page properties. I provided several screenshots on that page I was sending you to see, including one that removes underline.
In CSB4 and CSB3 has no way to do it automatically like CSB5. It requires a separate simple code be placed at the top of the page (inside an INSERT HTML block). The code will cancel the underline for ALL links on the page.
The code is given in column 3 on the page I mentioned before.
If you want to have ONE link on a page that does not have underline, your link must be inserted manually using code. CSB can not turn off underline for individual links. Every link setting is for the ENTIRE page at a time.