The game crashed to desktop when loading a new chapter - the one after you've completed installing the tracker.
Anyone having this problem?
I sometimes have this problem, the best way to fix it is by deactivating any/all trainer options before the loading begins, or before it finishes. It took me a few crashes before I realized that the trainer options being on was causing it. This likely happens because everything resets when the next level loads, and with the options on, it can't do that.