Importing/exporting a CSV file

A client called me for an assistance. He wants to change the label/name of the buttons (for lighting control) on a touch panel. But the names/labels are on the CSV files. See below module part. I am new on this and I need some guidance. Thanks in advance

MODULE_NAME='Module__Lutron_ZonenMgmt,Rev 1'(DEV vdv_Lutron_ZonenMgmt)
(***********************************************************)
(***********************************************************)
(* CONSTANT DEFINITIONS GO BELOW *)
(***********************************************************)
DEFINE_CONSTANT

//-----------------------------------------------------
// >> Lutron_ZonenMgmt KONSTANTEN <<
//-----------------------------------------------------
CHAR cLutron_ZonenMgmt__CSV_PATH[] = 'Lutron_ZonenMgmt'

CHAR cLutron_ZonenMgmt__CSV_FILE[][50] = {
'Lutron_SzenenMgmt.csv',
'Lutron_LichtMgmt.csv',
'Lutron_StorenMgmt.csv',
'Lutron_VorhangMgmt.csv',
'Lutron_ZonenMgmt.csv',
'Lutron_WetterAlarmeMgmt.csv'
}

(* Die Namen, welche in der EXCEL Liste in der Formatierung <XXXX hinterlegt sind, hier eintragen! )
CHAR cLutron_ZonenMgmt__ZONE_CMD_NAME[][20] = {
( Excel Scenen Management *)
'KNXSCENE',
'KNXSCENEORT',
'KNXSCENENAME',

                        /* Excel Light Management */
                        'KNXLIGHT',
                        'KNXLIGHTNAME',

                        (* Excel Storen Management *)
                        'KNXSTOREN',
                        'KNXSTORENNAME',

                        'KNXVORHANG',
                        'KNXVORHANGNAME',

                        (* Excel Zonen Management *)
                        'KNXMGMT',

                        /* Excel Wetter/Alarme Management */
                        'KNXWEATHER',
                        'KNXALARME'
                        }

//-----------------------------------------------------
// >> Lutron_ZonenMgmt KONSTANTEN <<
//-----------------------------------------------------

(***********************************************************)
(* DATA TYPE DEFINITIONS GO BELOW *)
(***********************************************************)
DEFINE_TYPE

//-----------------------------------------------------
// >> Lutron_ZonenMgmt STRUCTURE DATENBANK <<
//-----------------------------------------------------
//==> NEU: Structure DB ist im Handling definiert
// Befehle werden mittels Send_String abgesetzt
//-----------------------------------------------------
// >> Lutron_ZonenMgmt STRUCTURE DATENBANK <<
//-----------------------------------------------------

(***********************************************************)
(* VARIABLE DEFINITIONS GO BELOW *)
(***********************************************************)
DEFINE_VARIABLE

//-----------------------------------------------------
// >> Lutron_ZonenMgmt VARIABLEN <<
//-----------------------------------------------------
VOLATILE CHAR cLutron_ZonenMgmt__CSV_BUFFER[499999] //CSV Einlese buffer

VOLATILE CHAR bLutron_ZonenMgmt__ActivateDiagnostic = TRUE //Diagnostik aktivieren

VOLATILE INTEGER nLutron_ZonenMgmt_ReadNextCSV
//-----------------------------------------------------
// >> Lutron_ZonenMgmt VARIABLEN <<
//-----------------------------------------------------

(***********************************************************)
(* LATCHING DEFINITIONS GO BELOW *)
(***********************************************************)
DEFINE_LATCHING

(***********************************************************)
(* MUTUALLY EXCLUSIVE DEFINITIONS GO BELOW *)
(***********************************************************)
DEFINE_MUTUALLY_EXCLUSIVE

(***********************************************************)
(* SUBROUTINE/FUNCTION DEFINITIONS GO BELOW *)
(***********************************************************)

//__ Sende an Diagnostik __
DEFINE_CALL'Lutron_ZonenMgmt__Diagnostic'(CHAR cStringTxt[])
{
IF(bLutron_ZonenMgmt__ActivateDiagnostic) SEND_STRING 0,"'#[Lutron_ZonenMgmt] --> ',cStringTxt"
}

//__ CSV File Lutron_ZonenMgmt auslesen (select) __
DEFINE_CALL'Lutron_ZonenMgmt__ReadCSV'(INTEGER nLutron_Group) //1=Szenen CSV, 2=Licht CSV, 3=Storen CSV, 4=Vorhang CSV, 5=ZonenMgmt CSV, 6=WetterAlarme CSV
{
STACK_VAR SLONG slFileOpenResult
STACK_VAR SLONG slFileReadResult
STACK_VAR SLONG slFileCloseResult
STACK_VAR SLONG slSetDirResult

cLutron_ZonenMgmt__CSV_BUFFER = ''

(* File öffnen *)
slSetDirResult = FILE_SETDIR("'/',cLutron_ZonenMgmt__CSV_PATH")
slFileOpenResult =  FILE_OPEN("cLutron_ZonenMgmt__CSV_FILE[nLutron_Group]",1)   //Only Read                 

SELECT
{
(* File öffnen erfolgreich *)
ACTIVE(slFileOpenResult >= 0): 
    {
    CALL'Lutron_ZonenMgmt__Diagnostic'("'Open file ',cLutron_ZonenMgmt__CSV_FILE[nLutron_Group],' - success'")

    (* File einlesen *)
    slFileReadResult = FILE_READ(slFileOpenResult, cLutron_ZonenMgmt__CSV_BUFFER, MAX_LENGTH_STRING(cLutron_ZonenMgmt__CSV_BUFFER))
    CALL'Lutron_ZonenMgmt__Diagnostic'("'FILE_READ - Buffer lenght: ',ITOA(LENGTH_STRING(cLutron_ZonenMgmt__CSV_BUFFER))")

    SELECT
    {
    (* File einlesen erfolgreich *)
    ACTIVE(slFileReadResult >= 0):
        {
        CALL'Lutron_ZonenMgmt__Diagnostic'("'Read file ',cLutron_ZonenMgmt__CSV_FILE[nLutron_Group],' - success'")

        (* File schliessen *)
        slFileCloseResult = FILE_CLOSE(slFileOpenResult)

        SELECT
        {
        (* File schliessen erfolgreich *)
        ACTIVE(slFileCloseResult = 0):
            {
            CALL'Lutron_ZonenMgmt__Diagnostic'("'Close file ',cLutron_ZonenMgmt__CSV_FILE[nLutron_Group],' - success'")

            (* Schreibe Werte in die Datenbank *)
            CALL'Lutron_ZonenMgmt__WriteCSVinDatabase'
            }
        (* File schliessen fehlgeschlagen *)
        ACTIVE(1):
            {
            CALL'Lutron_ZonenMgmt__Diagnostic'("'Close file ',cLutron_ZonenMgmt__CSV_FILE[nLutron_Group],' - failed! / ErrorCode: ',ITOA(slFileCloseResult)")
            }
        }
        }
    (* File einlesen fehlgeschlagen (Read Failed) *)
    ACTIVE(1):
        {
        CALL'Lutron_ZonenMgmt__Diagnostic'("'Read file ',cLutron_ZonenMgmt__CSV_FILE[nLutron_Group],' - failed! / ErrorCode: ',ITOA(slFileReadResult)")
        }
    }
    }
(* File öffnen fehlgeschlagen (Open Failed) *)
ACTIVE(1):
    {
    CALL'Lutron_ZonenMgmt__Diagnostic'("'Set dir - failed! / ErrorCode: ',ITOA(slSetDirResult)")
    CALL'Lutron_ZonenMgmt__Diagnostic'("'Open file ',cLutron_ZonenMgmt__CSV_FILE[nLutron_Group],' - failed! / ErrorCode: ',ITOA(slFileOpenResult)")
    }
}
}

Yes