I'm asuming you've already talked to someone who might have the ability to change things for you? Cause if not, do that!
If your in the U.S, they legally have to provide materials and make things accessible for you, but that's a loose thing and schools like to argue around it so they don't have to pay money, but I believe your extra program is free. They would simply have to monitor it to make sure it wasn't harmfull or anything.
If they refuse to help you, then your just screwed, unless you can think of a way to use the original program.
One solution is too bring your own computer. But that might also not work depending on what the dependincies of the grades in the class are.
----------
“Yes, sir. I am attempting to fill a silent moment with non-relevant conversation.”
“You don’t tell me how to behave; you’re not my mother!”
“Could you please continue the petty bickering? I find it most intriguing.” – Data (Star Trek: The Next Generation)