My 737 Stopped Responding?

Good evening (to most of Europe anyway).Was hoping I would be able to run through Tutorial 2 today and I was in fact doing quite well until my 737 just stopped responding to me. I was on the ground at EHAM (Ok maybe I wasn't doing THAT well) going through the ALTN DES page as described through the tutorial. I got to the part where the tutorial reads

Press LSK 5L to switch to calculating the alternate via the MISSED APP.

Which I did and firstly all the values that were in on the page which were calculated from current position were gone. I thought it may be calculating so I left it for a couple of seconds and still nothing. I thought I would try going back and trying this portion of the tutorial again but to no avail. The FMC would not respond. I then looked up and tried pressing other buttons which although the animation would work (e.g. gear lever would move up/down) the actual effect would not. I tried changing the PFD view and although the selector moved the screen stayed the same. Nothing worked, so after hoping that my preparation would not go to waste i finally just shut-down MS Fight Simulator. There was no errors after closing so it wasn't a CTD.Obviously to have gotten the tutorial I am running SP1C. So Im guessing this may be a bug (but I hope not).To end on a positive note however Tutorial 2 is defiantly worth the wait. Its very refreshing and I like the Loads of different times in the flight that can be opened. Nice touch.