v6.0.2

I inadvertently left a line of code setting accountNumber to the first “401” account.

To keep this from happening in the future, and to make it easy for others to set an account number for testing, GetAccountNumberForTesting() was added in Mainwindow.xaml.cs. By default it uses the first account number in the list of accounts (as before) or reads an account number from the optional file AccountNumberForTesting.txt