C:\Tcl\bin>teacup help regenerate

    regenerate -- Regenerate broken toplevel pkgIndex.tcl files in a repository

    teacup.exe regenerate ?--at DIR?

        Regenerate the pkgIndex.tcl files in the lib/ directories of
        either the default installation repository, or the specified
        repository.

        All options are standard options, explanations can be
        had via

            teacup.exe help options