1b332cacab
installer.iss had #define MyAppVersion "2.1.0", so every release's setup.exe (and its AppVersion/VersionInfoVersion) self-identified as 2.1.0 regardless of the actual tag. setup-build-env.ps1 now passes /DMyAppVersion derived from GITHUB_REF_NAME (CI tag run) or git describe, falling back to a 0.0.0-dev placeholder in the .iss only for bare manual compiles.