Fabio,
You can create a query using a pie chart, for example, and configure the 'Configure Criteria' where 'Product Version' = 7.0 and 7.1 or you may want to have it be more specific. You may want to have 'Product Version' >=7 AND < 8.
You will want to play with that so that you are getting the report you really want.
I will say I think the reporting in 4.0 is FAR superior than previous versions of ePO.
Regards,
Jeff