And here is why, and more than likely in how the .exe was created Witch is Witch one is 4 and one is 5 TrainSimWorld.exe TrainSimWorld.exe
I can confirm this. Last night TSW 5 was still displayed as TSW 5, since this afternoon it's suddenly TSW 4. No idea what went wrong, I just changed it manually back to TSW 5.
If I remove TSW4 and start TSW5 to try and make it TSW5, it doesn't show up so I'm just putting up with it