UTFTGLUE fonts not working

Hi, I wanted to change displayed font, but without succes. I tried default fonts and custom fonts, but it didn’t work. I added “.c” files into project folder, they are all displayed in tabs in IDE and still nothing. I am using 3,5" 480x320 MCUFriend TFT screen with ili9488 driver directly plugged into Mega 2560. I am running this code:

#include <Adafruit_GFX.h>
#include <UTFTGLUE.h>
#include <TouchScreen.h> 
#include <Keypad.h>
#include <avr/pgmspace.h>

extern uint8_t SmallFont[];
extern uint8_t BigFont[];
extern uint8_t SevenSegNumFont[];
extern uint8_t arial_bold[];
extern uint8_t FreeBigFontBitmaps[];

String buttons[3][5] = 
{
  {"7","8","9","0","*"},
  {"4","5","6","+","/"},
  {"1","2","3","-",","},
};

int a,b;
int incrX = 75;
int incrY = 70;

UTFTGLUE LCD(0x9488,2,1,3,4,0);


void fillBackground()
{
LCD.setColor(255,255,255);
LCD.fillRect(10,10,470,75);
LCD.setBackColor(200,200,200);
for (a = 0; a < 3; a++)
{
  for (b = 0; b < 5; b++)
  {
    LCD.setColor(200,200,200);
    LCD.fillRoundRect(b*incrX+20,a*incrY+105,b*incrX+70,a*incrY+155);
    LCD.setColor(0,0,0);
    LCD.print(buttons[a][b], b*incrX+43,a*incrY+125);    
  }
}
LCD.setColor(200,200,200);
LCD.fillRoundRect(400,105,460,305);
LCD.setColor(0,0,0);
LCD.print("=",428,195);
}

void setup()
{
randomSeed(analogRead(5));   
pinMode(A0, OUTPUT);       
digitalWrite(A0, HIGH);
Serial.begin(9600);
LCD.InitLCD();
LCD.clrScr();
LCD.setFont(BigFont);
LCD.setColor(255,255,255);
LCD.fillRect(10,10,470,75);
LCD.setColor(200,200,200);
fillBackground();
}

void loop()
{

}

Thank you for your advices.