ToME: the Tales of Maj'Eyal

I downloaded the Infinite 500 addon (http://te4.org/games/addons/tome/infini ... d-level-50) from the addons section of the main menu and it showed up in the list to configure addons. Wanting to get as strong a character as possible in order to challenge the infinite dungeon on nightmare mode, I changed the mod only slightly, from:

if self.level == 10 or self.level == 20 or self.level == 36 or self.level == 46 or (self.level > 50 and (self.level - 6) % 30 == 0)

into:

if self.level == 10 or self.level == 20 or self.level == 36 or self.level == 46 or (self.level > 50 and (self.level - 6) % 15 == 0)

However, even with this slight change the addon no longer shows up in my configure addon menu and is not affecting the game. It's definitely installed into the right folder (game/addons) and the file name is the same as it used to be. Im stumped on how to get the game to recognise the addon and would appreciate any help.

Did you unpack or repack this addon?
That is likely where the problem is.

To a novice, what do you mean by unpacking or repacking? What I did was opened the game/addons folder, opened the tome-Infinite500_9.teaa file, changed the line of text and saved the file in the same location with the same name.

EDIT: I just figured it out. Thanks for the help anyway.