Thanks John but either I don't understand your answer or you didn't understand my question. You have helped me before by the way. I will try to phrase my question more clearly.....I presently use BIAB 2010 from its external hard drive via USB. The question is, Can I open the "Styles" window & find anything that tells me which styles were part of which earlier version. For example..Which came with 2009, or which came with 2010 etc? Is there a sign, a number or some suchthing? Now I'm going to read your answer again as I know I will find useful information...Ireally thank you...Hank