They are asking for all evidence that is present to be judged, which my understanding is they have lost because VBS case is not strong enough.
They are asking for the Judge to make a judgement to stop sales based on the evidence at that particular point in time. I stress, this does not mean the case is won or lost simply because the injection could have been sanctioned.
Lets take it into another context.
I am suing Microsoft for selling a peice of software which can be used to "Crack" a program I sell. The software might be legitimate, but is well known for "Cracking" my program.
I could ask for the judge to place an injunction into Microsoft to stop them selling their software, because by doing so, every sale could potentially damage my business by allowing another person to crack my software.
The judge agrees, Microsoft is no longer allowed to sell the software until the evidence is examined, and my assets are protected while the case is decided.
After the injunction is in place, the case continues, however it becomes apparent a flaw in my software means the program microsoft is selling is completely legit. The injunction is then lifted.
Vbulletin is using the arguement that xenforo by being an actively saleable peice of software continues to damage their company by taking away potential "illegitimate" customers, hence the request for the injunction.
An injunction is not a final verdict on a case, it is done to protect the plaintiff from taking any further damages that may arise while the case is being decided from the actions of the defendant.