Select all files in a directory at once by clicking on the top file, holding down the shift key and scrolling down to the bottom of the list and selecting the last file. All files will be highlighted. Right click the mouse and go to Properties and select the permissions for all of those selected files.
Unfortunately I do not have the option of "recurse subdirectories"when I right click on the folder. I am using V2.1 build 1649, is it only an option with other versions?