Stats missing since upgrade

-- HikaShop version -- : 2.3.5
-- Joomla version -- : 2.5.28
-- PHP version -- : 5.3.3
-- Browser(s) name and version -- : Firefox 34.0.5
-- Error-message(debug-mod must be tuned on) -- : No error message - see main message

Hi, I'm working through upgrading a site from Joomla 2.5 to 3.3 and Have updated HikaShop to 2.3.5 and the statistics panel is now empty. Nothing is showing except empty 3 empty panels, Last 7 orders, Sales this Month and Mani stats. All the orders etc. are OK it's just the stats on the dashboard that are missing.

Hello,
Do you have at least one confirmed order from January ?

Last Confirmed order was 31/12/2014.