Just downloaded the 0.1 alpha for Windows, got some strange things during install.
1) When i start the installer/when i click the "next" button, it hangs for 10-15 seconds, using 100% of processor time.
2) After it extracted files, it changed directory to "Creating temporary file" and did nothing for 3 minutes, consuming all processor time, so i killed it. It seems that not all files are installed - uninstall.exe is of wrong size and some earth mask is missing.
I checked the md5, it's the same as listed in your webpage.
PS: why don't you use some kind of pak-files? The installation&deinstallation would be many times faster...