It looks like there is nothing interesting in that log.
Well, did you used any svn/perforce/etc for that project? If yes, try to restore previous version of last changed files. If not - use it for futher work.
Additionally you can try to remove engine shaders cache files (somewhere in appdata/local) and restart editor.
It is also possible that your changes broke something in map where they used. If this is default map, try to open project with another default map, by changing “editor startup map” in ini file.
As an option - create new project and move content files into it.