Tdraym (and everybody else having download problems): Contact Quicken Support. Be prepared to provide download log files so that Intuit can take a closer look at the issue and determine the cause of your problems.
AFAIK, there are no current issues with BofA downloads. Have you tried to deactivate _all_ your BofA accounts in Quicken and then reactivate them, being sure to choose the proper BofA bank from the available choices. Be sure to have a good backup of your Quicken data file before you start working on this, in case there are any problems.
Mr Shaky, have you tried this: Make sure _all_ your BofA accounts are deactivated / removed from One Step Update. Also make sure you have a current backup of your Quicken data file, just in case ... Logon to your bank's website and initiate a Quicken - compatible transaction download. Follow the prompts upon receiving the download into Quicken and that should reestablish your connection.