[REQUEST] Tekla v15 "steel1.exe" error?

[fflluu]

Hi, I'm a Korean student.
I am studying Tekla v15 SR1(Downloaded from torrent)
But the problem is, the "steel1.exe error" keep coming up after I draw something.
(exactly right after when i press apply button)
Does anyone know what is the problem and how can i solve this problem?
I really got sick of this and wanna change it to tekla v16 but I could not find v16's Korea enviroment online.

Please help me out!!!! :dash2:
Thanks!