London Underground Simulator won't start

London Underground Simulator (World of Subways 3) won't start on my system! It worked earlier today when I changed the options and closed it. Now it shows as just a tiny window in the Top-Left of my screen.

System Specs:

AMD A6 6400K @ 3.9GHz, 6GiB RAM (1x 4GiB Crucial @1600MHz (Running at 1333MHz for compatibility) & 1x 2GiB G.SKILL @ 1333MHz), 1.75 TB storage (1x 750GB Seagate HDD @ 7200RPM, 1x 1TB Samsung HD103SJ @ 7200 RPM), ASUS GeForce GTX750 TI. Windows 7 Home Premium 64-bit

I have uninstalled and reinstalled DirectX 9 and 10 (Both required for the game) with no luck. If anyone can help me out, I would be grateful. I have attempted to reinstall the game (and the Aerosoft launcher required to launch it) twice. I have also tried moving the game from my 1TB HDD to my main 750GB HDD and updated the Aerosoft launcher from 1.0.0.8 to 1.2.0.3 with no luck.

I just upgraded to Windows 10 and it still doesn't work.

I have Windows 10 now. All I did was update Aerosoft (Which was downloaded when I got WoS3 on Wind. 8.1). I opened up the menu for the game, and said I had to activate it. So I put my code in (the one inside the CD case) and activated it online. When it had activated it, it said it was ready to play, and I was able to play it.