v6.0.2 is providing arm64 builds (/cc @mstv @maraf @gerhardol @RussKie )
The consequence is that Download-GitExtensions.ps1 downloads arm64 version instead of x64 version:
1>Searching for Git Extensions release 'latest' on 'GitHub'.
1>Selected release 'v6.0.2'.
1>Selected asset 'GitExtensions-Portable-arm64-6.0.2.0-f02a06bf5.unofficial.zip'.
1>Downloading 'https://github.com/gitextensions/gitextensions/releases/download/v6.0.2/GitExtensions-Portable-arm64-6.0.2.0-f02a06bf5.unofficial.zip'...
Download-GitExtensions.ps1 (and GitExtensions.Extensibility.targets?) should be updated to support arch specification and download the good version...
The check: https://github.com/gitextensions/gitextensions.extensibility/blob/master/src/GitExtensions.Extensibility/tools/Download-GitExtensions.ps1#L88