02-24-2013, 08:39 AM
I use HxD, never froze, the only issue it has is if you edit the files you have opened with another program.
You'd delete everything that comes in front of "‰PNG" (0x89504E47). That means, that one character in front of PNG (which is a black rectangle in your editor) should be the first in your new file - the new file should start with "89 50 4E 47" in hex.
"49 45 4E 44 AE 42 60 82" in Hex or "IEND®B`‚" in text marks the end of a PNG file (although I'm not too sure about the last four numbers, they may differ, the IEND is always there) but having more data behind that should not matter, as this chunk already tells the program that the PNG ends there and it shouldn't read onward.
You'd delete everything that comes in front of "‰PNG" (0x89504E47). That means, that one character in front of PNG (which is a black rectangle in your editor) should be the first in your new file - the new file should start with "89 50 4E 47" in hex.
"49 45 4E 44 AE 42 60 82" in Hex or "IEND®B`‚" in text marks the end of a PNG file (although I'm not too sure about the last four numbers, they may differ, the IEND is always there) but having more data behind that should not matter, as this chunk already tells the program that the PNG ends there and it shouldn't read onward.