Running on single sub-directory on Windows yields "Unknown-Executable!" error

[sschuberth]

On Windows (from a cmd shell) I'm running weasel like

C:\Users\sebastian\Downloads\weasel-0.0.3-windows-amd64>weasel.exe -a -d . C:\Dev\oss-review-toolkit

to only scan the root of C:\Dev\oss-review-toolkit, which yields

In directory: C:\Dev\oss-review-toolkit
Error                                 Unknown! ..\..\Users\sebastian\Downloads\weasel-0.0.3-windows-amd64\weasel.exe