@Sparky2019, this is always a nightmare, being afraid if with a newer version you have problems that up to then you didn't.
Finally, I realized that the code I mentioned in my previous post is working with SPI communication/screens. So with a shield attached to Uno and a 40-pins (2 rows of 20 pins) TFT 3.2" with display model ILI9341_16 and pins 19,18,17,16 as parameters in the UTFT it worked!
The strange thing is that works fine only when in the URTouch I put as parameters what it is prompted for the MEGA, not for UNO!!
// Set the pins to the correct ones for your development board
// -----------------------------------------------------------
// Standard Arduino Uno/2009 Shield : <display model>,19,18,17,16
// Standard Arduino Mega/Due shield : <display model>,38,39,40,41
// CTE TFT LCD/SD Shield for Arduino Due : <display model>,25,26,27,28
// Teensy 3.x TFT Test Board : <display model>,23,22, 3, 4
// ElecHouse TFT LCD/SD Shield for Arduino Due : <display model>,22,23,31,33
//
// Remember to change the model parameter to suit your display module!
UTFT myGLCD(ILI9341_16,19,18,17,16);
// Initialize touchscreen
// ----------------------
// Set the pins to the correct ones for your development board
// -----------------------------------------------------------
// Standard Arduino Uno/2009 Shield : 15,10,14, 9, 8
// Standard Arduino Mega/Due shield : 6, 5, 4, 3, 2
// CTE TFT LCD/SD Shield for Arduino Due : 6, 5, 4, 3, 2
// Teensy 3.x TFT Test Board : 26,31,27,28,29
// ElecHouse TFT LCD/SD Shield for Arduino Due : 25,26,27,29,30
//
URTouch myTouch( 6, 5, 4, 3, 2); // If I put here 15,10,14, 9, 8 it doesn't work!!! I see "white" screen.
Draw buttons on the paper, glue it to the screen and voila - you got a button board with backlight!