Download latest ja2.exe (Development version) directly from:

* D.Brot's SkyDrive *
https://skydrive.live.com/?cid=013a6926eac52083&id=13A6926EAC52083%21202

* Faalagorn's Google-Drive* 
https://drive.google.com/folderview?id=0B6NEi4vM86_bUm1jc3pSNFNKM0k