sub regDelTree {
    my $rootKey= shift @_; # Reg key to del subtree from
    my $keyName= shift @_; # Name of key to delete
    {
        my $key= $rootKey->{$keyName};
        if(  ! $key  ) {
            warn "Can't open $keyName in ",
                $rootKey->Path(), ": $^E\n";
            return;
        }
        for(  $key->SubKeyNames()  ) {
            regDelTree( $key, "$_\\" );
        }
    }
    delete $rootKey->{$keyName}
        or  warn "Can't delete $keyName from ",
                $rootKey->Path(), ": $^E\n";
}

regDelTree(
    $Registry,
    "HKEY_LO­CAL_MACHINE/SOFTWARE­/MyWay/",
);