Reopen Block UI Styler and add values

I create a user form using Block UI Styler that has one double and one integer( two textboxes) then I exit the Block UI Styler.

Now I need to add one extra textbox to the same UI Styler.How do I re-open the same UI from NX so that I could add in the same design?

Regards,

Go to the Block Styler application, choose "open" from its File menu, and choose the dlx file you created.

Thank you so much..It worked :)

Prarthana