When do will get the next progress report? I love reading about the progress of the project, and I was happy when I thought that we would be getting monthly updates since the February one.
You have to extract the 7z file before running the game. Use the "Extract" button, select a folder where you want the game, and extract. Now you can close 7-Zip, and then, go to that folder and run the game.
For the interested in extremely hidden and pointless messages on games, here you have the meaning of the glyphs on the fake error message that you get on Chester's route.