PT3 ---> PT4 Upgrade Question

[battleextrem]

I read this

"Buy PT3 now, get the upgrade to PokerTracker 4 FREE!"

So i have a Question.
Is there a time limit where I need to buy the Pokertracker3??? I have my Tracker since 3 years. Can I upgrade it for free??? Would be glad if you can tell me a specific period. (from -to dates )
mfg battle

[WhiteRider]

You get PT4 for free if you bought PT3 after June 10th, 2011. Since you bought it earlier than that there will be an upgrade fee. Pricing has not yet been announced, but I'm assured the upgrade will be very reasonable.