If you have a text box on the card and you have clicked all the Oks there is still a way to change the text, or alignment etc. Go to the tools menu and pick the select tool.(It looks like an arrow).
Then click on the text box(or object) you wish to change. Now go to the edit menu. Then choose the "Edit this object" option. You will then be able to edit the various options .text, alignment,scroll etc.