Migrate 3.x query,workbook into BI 7

Hi,

To migrate the old 3.x query, workbook and Web template, the documentation says we can just open the existing 3.x query, workbook and Web template with new BI 7 BEx Query Designer, BEx Analyzer and BEx WAD and save it. New BI 7 query, workbook and Web template will be created. These query, workbook and Web template will then be open and run in BI 7.

However, it also says that the old 3.x query, workbook and Web template will still be sitting in the system.

Question now is what is the purpose to have the old queyr, workbook and Web template sitting in the system?

If we don't need them anymore, can't we just delete it? Manually? How?

Please advice, thanks.