Hey genome2k, welcome to MobileRead! I recommend to read
Things you can do with your iLiad.
(1) Some software comes with uninstallers shipped, but for some you have to delete the files manually. For restoring factory defaults have a look at
How to unbrick (reflash, restore, etc) your iLiad.
(2) You might give
emelFM2 a try, it's a file management tool.