For data import
Most tabs in Manager corresponded to a database table. Order the data import to ensure you start with non dependant data, then importing data which references already entered data.
For more information:
A forum search is a good place to start, such as Search results for ‘Quick books import’ - Manager Forum
The advantage of doing so is summarised here Can I import data from Quicken? - #6 by Patch
For how to do it see this post How to import data from other accounting software - #6 by Patch
For starting balance see