When starting the Quickmap Data Download Manager, you may get this error:

Problem with Quickmap Data Download Manager

The user name or password is incorrect.

This is possibly because the Log On account used in the Quickmap Data Download Manager service does not have permission to the Data Directory. To correct this, launch services.msc, find the Quickmap Data Download Manager service in the list, right click it and click on Properties, then on the Log on tab, change the user account to an account that has permission to the Quickmap Data Directory and click OK before trying again.