That includes this line:
Code:
ERROR: Techniques: Find duplicate technique name: radeon8500sea
Make a copy of "MODULES\Techniques\Weather\Sea\RadeonSea.sha". Put the copy somewhere completely outside the game installation folder. This is just to be safe; you want to be able to put it back if this doesn't work, and it must be somewhere that the game can not possibly find it.
There's another, newer version of "RadeonSea.sha" in "MODULES\Techniques\Weather\" and it may be the combination of the pair which is causing trouble. Deleting the older one might solve the problem. Or it might cause the game to crash completely, in which case, put the copied file back.