What i'm doing wrong?
 

I have RockChip RK27XX player, same as in picture.
I got access to firmware with that rkusb.tag file. I downloaded RK27UIEditor for firmware editing. I make a copy of BMP0.bin as a backup in my PC, then I make another copy for editing. First i thought that all is working fine, i edited BMP0.bin as i like, saved it, then deleted old BMP0.bin from player and put in new BMP0.bin. But when i disconnected and restarted my player nothing changed. I connected my player back to PC and old BMP0.bin was back! I recognize old file by it's size. Original size is 14.4MB, but edited 14.7MB.
I tried many times, but nothing changed. What I'm doing wrong?