The HeroesinTheSkyDownloader_100630.exe file you have requested: Clients / Heroes in The Sky Open Beta Downloader - 1.84mb is not available. Upload any files you want to share. This is the only information we could locate:
The open beta for the MMOTPS WWII flight combat simulator will allow players access to the entire game. This file is the downloader which will give you access to install the client.