This page lists downloads for astonia, while i have checked every file for viruses, you should also check just to be extra careful
Astonia Alchemy Calculator rar zip exe new beta
Builder Files
There are two versions of the editor, small and full. The full editor includes all of the .pak files from the folder, this is the recommended download. If you already have the game installed and are on a slow or mobile internet connection you can download the small option, but you will have to copy the .pak files from your game folder to the a3edit folder. Both Installs contain the manual.
Builder files are now located on the PA forum Builder Forum