using version 7.0.5.0 under win7 x64.

option auto-categorization is on.

add extension *.nzb to file type lists.
add a new category nzb to "other files".
i edit the category and set the proper extension.
i set default download folder to d:\nzb and check the box
i set "include this category when auto categorizing"

this works fine until i re-start program.
then i find that the check-box next to default download folder is unchecked! (the folder d:\nzb is still in the list, tho, and comes up first)
happens every time.

i assume this is a bug, or is there something i don't understand?