I'm afraid this is all I can get, otherwise I have to install diablo again along with ES.
It does exactly what it says there. For instance, if you choose only assassin items, on gamble screen you will find only items that an assassin can equip and rings + amulets (I think this is some engine limitation, rings and amulets will always appear, no matter what you check. However they occupy a slim space). You can check multiple options. I believe this tool modifies directly the game files because once you check a category it will remain so till you check another.
I'm just saying that the charms are weak because I can get hollow books with 2 sockets easily with much better stats than the charms themselves.