In the StatPress forum many support requests go unanswered.
Is StatPress abandoned by its creator?
I have several issues with StatPress. Apart from that it is (probably) not working with WP Super Cache, there is this problem that StatPressUpdate never worked for me. So it didn't even work before installing WP Super Cache.
It just sits there on the update screen, with "Updating..." as the page title, and all 6 sections collapsed. Only "Struct wp_statpress" shows "0,18 Mb (972 records)"