Plating on t430 thinkpad, changed GX settings and now game refuse to open

[TootsMcDoots]

i changed some settings due to lag ( turns out it was a server addon still loading some stuff(ttt) ) and now opengl fails to open the game, i've try reinstalling and -autocinfig -safe changing dx level... check game files...it just refuses to lunch and i did not yet make abackup before i had started it up and played, i know that it was working but i changed the setting from high to low and it hung and crashed and wont lunch anymore, the best i get a blue screen for 10 secs maybe the little back loading screen in the bottom then it just closes and yeah, what can i do and what infos do you all need?

is there some kind of debug mode? it was working fine but i dont know what to do from here on out, google is not much help.