First put it into a variable (I'm going to use X)
set x="F"=hex:02,00,01,00,00,00,00,00,b4,42,39,6f,86,fd,cd,01,00,00,00,00,00,00,00,\00,d7,2f,f1,d8,0e,e9,cd,01,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\f4,01,00,00,01,02,00,00,11,02,00,00,00,00,00,00,00,00,2e,00,01,00,00,00,00,\00,00,00,88,52,35,00
Then you can replace 11 with 10 by
set x=%x:11=10%
Note: Don't do this method if there would be two 11's in the script because it replace them all.
If there is more 11's but that 11 is in the same exact spot (if it was 58 characters into the line then it must be 58 characters into the line the next time) so you would count the characters leading up to the 11 and take that X variable and make another variable named 1 and the contents would look like this:
set 1=%x:~0,178%
Then find out how many characters are right after the 11 to the end and name the variable 2 and add 2 so you end up skipping the 11:
set 2=%x:~180,70%
Then after that you just input the new value in between in this case 10 so it would be:
set X=%1%10%2%
Then you have the new output back in the X variable!