A set of Accounts i.e, a combination of cheque, savings, credit card etc accounts, is often referred to as a data set in Moneydance. You can have as many data sets as you wish and they are not connected in any way, they are completely independent.
There is a PDF document for the previous version and that is located at:
Personally I would prefer some consolidated documents but there it is.
I would suggest you download and try the software in trail mode, it is fully functional but the only limitation being a 100 manually entered transaction limit which a purchase of the software will provide a license key that will remove the limit if you should decide to keep using the software.