Could someone please reassure me that the plugin is completely blank, useless...

Err, it isn't totally empty. Contains the name of whomever compiled it at gamesas HQ and that it's dependent on oblivion.esm as a master. That's it,really.

Well, at least a few people out there rename their UOP to DLCShiveringIsles.esp to save a slot, so you're probably okay. The purpose of the ESP is to make sure the game loads the associated BSAs. You should be able to create a dummy ESP in TES4Edit and name it DLCShiveringIsles.esp, to make sure your BSAs load.

gothemasticator

Thank you, haha. I just reinstalled yesterday, and I do not feel like reinstalling again just to get one ((practically) empty plugin.

Edit: I'm too anol sometimes, so I might of actually done that. You know, to have back up for no reason...