Hi,
The problem is that you set the "Maximum (percent)" option of the AUP plugin to 0. So the system considered that you couldn't buy products with points.
Putting it to 100% allowed it to work.
Ideally, when the "Partial payment" option is off, that option should be discarded. We'll change that for next version. To avoid the problem for other users.
The AUP payment plugin is now displaying once you're logged in with enough points.
For the PayPal payment method: it's normal that you don't see it. You selected the currency USD for it. So it will only display in that case but your main currency is points. So it won't display unless you change the currency with the hikashop currency switcher module.
There is no method to automatically change the current currency (and thus the payment method) based on the products in the cart, but you should be able to do that by adding some custom code in the checkout view.