And your (their) circumstantial evidence is simply and only proof that the defendant bought the code.
Nothing showing that he used it, or even had the equipment necessary to make it work.
No records displaying a discussion of any problems with it, how to set it up, what channels would be available, how long it was good for, what IP to use to connect to.
Your contention is that his purchase displayed an initial intent, and that should be good enough to garner a judgment against him.
Mine is that this isn't a criminal court felony case, where mere intent might be enough, but a relatively low level civil action, where just a little more would need to be proven by the plaintiff.
Plaintiff; he bought the code
Defendant; I never used it
50/50 so far.
The plaintiff would need to push it over the edge, even ever so slightly, with another tidbit of evidence.