so I'm playing update 0.1.6b and the window never popped up but the download is 642Mb.
Viewing post in Black Garden (Alpha 0.1.9b) comments
This is probably by far the weirdest issue I have seen so far. All I can really suggest is maybe redownload and put the game in a new directory or maybe even on a different disk and launch it from there.
Also, I would suggest using 7Zip to unzip the game as WinRar has been acting up a lot lately for VXAce games.