1) Based on the requirement to override export_data method and make the changes in check box values.

def export_data(self, cr, uid, ids, fields, context=None):
    checkdataindex = None
    for index, fieldlabel in enumerate(fields):
        if fieldlabel == 'check_labelname':
            checkdataindex = index
    res = super(modelclass_name, self).export_data(cr, uid, ids, fields, context=context)         
    for index, val in enumerate(res['datas']):
        if checkdataindex is not None:           
            check_date = res['datas'][index][checkdataindex] 
            if check_data=='TRUE':
                res_check_data = 'X(true)'
            else:    
                res_check_data = 'blank(false)'
            res['datas'][index][checkdataindex] = res_check_data   
    return res

2) In the Export options Select the Export field to right side and click the default options "Fields to export Save fields list" and Save as: File Name

After that Export Data easy to Access with File Name.