We regulary update games for iOS. The new versions of these games are new freemium apps. If you bought a game earlier and button "Restore" or "Already purchase?" doesn't work, send the confirmation of purchase to us. There are three ways of finding them:
1) letters from iTunes
2) History of purchases (see images PH001-PH005)
3) request a re-check from Apple Support.
Then we will send the full instructions for restore.