SyntaxError: Unexpected identifier (line 11, file "DeleteFiles")

So I asked for help a while back building a .xls converter, and it worked great, until now it suddenly isn't working and it's giving me this error: SyntaxError: Unexpected identifier (line 11, file "DeleteFiles"). I looked through the code and I did not spot a syntax error. Any help in solving this would be appreciated.

function XLSConvert() {

    var files = DriveApp.searchFiles("title contains '.xls' and parents in 'File_ID'");
    var destinationFolderId = "File_ID";
    var existingFileNames = getFilesInFolder(destinationFolderId);
    while (files.hasNext()) {
        var xFile = files.next();
        var name = xFile.getName();
        try {
            if (!existingFileNames[name] && (name.indexOf('.xls') > -1)) {
                var ID = xFile.getId();
                var xBlob = xFile.getBlob();
                var newFile = {
                    title: name,
                    key: ID,
                    'parents': [{
                        "id": destinationFolderId
                    }]
                }
                file = Drive.Files.insert(newFile, xBlob, {
                    convert: true
                });
            }
        } catch (error) {
            console.error("Error with file " + name + ": " + error);
        }
    }

    function getFilesInFolder(folderId) {
        var folderId = "File_ID";
        var folder = DriveApp.getFolderById(folderId);
        var filesIterator = folder.getFiles();
        var files = {};
        while (filesIterator.hasNext()) {
            var file = filesIterator.next();
            files[file.getName()] = true;
        }
        return files;
    }

}