Symlinked steam_api64.dll as explained in other reports

Works like a charm most of the time, however, sometimes the game drops framerate to ~1 fps and everything (in-game time, response to input, menu animations) slows down dramatically. This appears to be linked to passing specific places in specific scenarios: So far, I've (reproducibly) encountered it when driving along a specific curve just west of Köln Hbf in "ICE and Rain" (SFS Köln-Aachen) and when approaching Kilburn Park Station in "Zone One" (Bakerloo Line). In the latter case, I tried to finish the scenario and the two remaining in-game minutes took more than twenty minutes real time. This also affects all subsequent menus and simulations until the game is restarted.

Again, other than in those two cases the game has (so far) worked wonderfully, although I fear that there may be more of these problems.