The permission input is made up of 9 bits of an integer. The easiest way to control this is to change the radix of the control or constant you use and change it to binary. Then, you have nine 0 or 1 digits which you need to set. I don't remember their details at the moment (I think they are read, write and execute for three different levels), but it should be documented in the help. I think nine 1's (511) should do what you want, but you should note that in any case LabVIEW sometimes holds an open reference to a folder you used and doesn't release it until LabVIEW is closed.
___________________
Try to take over the world!