I'm Fernando I'm Professional Video Games Designer and 3D Animator in Dovetail Studio England
I'm From London if you need help write in private message
@Saeko_Himejima_1990 if you want to use original TS 2015 must to buy the game because your game is not complete in the files or folders must to has kuju folder for diesel locomotives the original TS 2015 is complete game with all files and folders also your version 48.0 that is versio of exe of the game train simulator has US locomotives Diesel how example ES44AC, SD40-2 and more diesel locomotives from Kuju
@Saeko_Himejima_1990@Saeko_Himejima_1990 friend what do you want exactly i don't understand you absolutely for which class you are talking of TS and for which routes in TS ???
@Saeko_Himejima_1990 friend your game of TS must to has ES44AC locomotives if you not has ES44AC your game is not complete in the locomotives I sent you link for download locomotives download and instal in your game of TS that is not imposible your game not to has ES44AC