You did not say which Acrobat/Reader version you're using. The UI in the 3 last versions is different in each of them. For Adobe Reader XI you go to Edit->Preferences->Signatures->Creation&Appearance->More... You get "Creation and Appearance Preferences" dialog which lists all your appearances and you can select one of them and click "Delete".
Thank you so much! I was able to delete what I needed! BTY-I use Adobe Acrobat X Pro. I had to go to Edit>Preferences>Security in order to get to the Digital Signatures and Appearance section where it allowed me to delete what I needed.
I thank you again!