Where did you get an 1.8 GB Dominion 1.03 ? Last time i checked, the file size is about 977 MB. This update is roughly 850 (880 ?) MB. This is due to the fact that the images are WEBP (compressed) file format, not JPG. The error codes i get indicate that the game looks for JPG files, but there are only WEBP images. Either the files need to be
converted to JPG, or the code needs to be changed to address the compressed format. Therefore a smaller game size doesn't necessarily mean there are missing files, and from what i have gathered the game has indeed additional content.