Default psx droid question

Ok so I bought the psx4droid emulator way back when it first came out... so v1... but now there is v2 out for purchase... do i have to rebuy the app to get v2? cuz the app that i have now that keeps getting updates says old version in the market yet the app in the app drawer says v2... I am confused out of my mind and this most recent update has ruined my ff7 saves... so do i need to buy the new one?