basically that will be the case
the installer script has to be uploaded and run then deleted for security.
the updater scrip currently is just run from a url , but i will try and make it so its run of the admin panel and only people with admin panel right can use it.
using the updater , yes you can add *any* word , jargon ,abs whatever
there is no functunality to change words though or delete them , good idea I will look into that . But I think that functionality will have to wait till v2. Think about it , you have like 130,000 words , just ilsting them and asking you to type out the one you want to delete would be naff , so I'd have to make a nice interface with tick boxes to delete , or icons to edit em etc etc , there not that much need to go around deleting words or changing em when you can add more really.