https://gyazo.com/1e3f8248e5bc7e46386bbc93930a5aab
Installation instructions say to run StardewModdingAPI.exe, but I don't see one in the folder either before or after extracting. Is this user error or something wrong with the most recent update?

You downloaded the source code. Download the release from https://github.com/cjsu/SMAPI/releases