You'll usually find something of the sort in the license agreement, if it's there at all. Some companies specifically disavow that their software is useful for any purpose at all, and state that you're on your own if you have any problems. Others strictly limit the approved uses (and/or users) of their software, and disavow any other purposes to which it may be put.
Somewhere in the mass of legalese, there's likely a statement that any disputes concerning the software will be handled either by binding arbitration (often even specifying which firm will conduct the arbitration) or by the courts of a specific state. A lot of US companies, no matter where they are physically located, are incorporated in Delaware, because Delaware laws and courts have historically been favorable towards them.
