Randomise file names (and directories if set too), while keeping the file extension.
CAREFUL: This will make changes to all the files and possibly directories in the folder it is ran. Read the instructions and maybe do a few tests to see how it works
-p: prefix is how many of the start of the file you want to remail the same. Example file1.jpg will be changes to: fi(random).jpg if this is set to 2 and it will be fil(random).jpg if it is set to 3, or (random).jpg if set to 0
-l length of the length of the created file. The extention (like .jpg) will remain the same
-d: If this is set, then it will also randomise directories