Update: I managed to figure out my connection problem and fix it. Both the modem and router were performing NAT (Network Address Translation) and that was blocking my connection. Once I disabled the router NAT, I could connect. Once I could connect, iC Pro could see my computer so I didn’t have to type in an address, so it didn’t crash. Now it’s working as it should, as far as I can tell so far. So the main problem was caused by the guy who set the router up for my roommate before I got here, but still Steinberg and/or Apple (probably more Apple, but Steinberg needs to patch iC) are responsible for the app crash when trying to do a normal function of the app.