What is a .loli file and how do i use it with Openbullet?

[Cocoscryp]

Sorry guys for being such a noob but hopefully someone can help me. What exactly is openbullet and what does it do? There is a .loli file that i got from this site called "Flingster with Capture" and i was confused how to use it or what exactly it is. Does it unlock the premium features on flingster.com? If so how do i use it as i currently have no clue, any help would be appreciated, once again i apologise for being so clueless