There are two problems according to the errorlog:
Graphics: Intel(R) HD Graphics Family Vendor: Intel OpenGL version: 3.1.0 - Build 8.15.10.2462
This indicates that this is most likely an Intel HD 3000. The version 8.xx does not work with the game, since this driver has some bugs related to OpenGL. Intel already fixed the bugs for later driver versions, so you should update your Intel driver.
If you have a secondary graphics card alternatively, you need to assign it manually to the game
com.jme3.asset.AssetNotFoundException: MatDefs/General/StaticLightingMaterial.j3md
This indicates that some gamefiles are missing (maybe something went wrong when downloading). Just download the game again. But if you have reinstalled the game anyways, this problem might be solved already (only the problem with the graphics card remaining^^)