First of all Elona is a FREEWARE GAME, so if you paid for it you got scammed.

The original game (up to version 1.16) is found here: http://homepage3.nifty.com/rfish/file/elona116rfix2b.zip

You can check the latest version of Elona+ here: http://elona.wikia.com/wiki/Board:News_and_Announcements

The newest Elona Custom patch (AKA the English translation patch) is found here: http://elona.wikia.com/wiki/User_blog:AnnaBannana/Elona_Custom

To install just unzip the game into any folder (overwriting any files as you paste the newer patches) and click Elona.exe (It's not a virus) After that personalize the game in options or by editing the config.txt file.