I have done as remain suggested - the files and folder remain in my trash. I did not do a restart of the macbook. All I did was try to relaunch Cog. An empty Cog interface launched and it asked if I wanted to update automatically. I clicked "Yes" and it crashed again. On the retry it also crashed.
Vspader, I will send you the console log as well as the error log.
Please let me know what is wrong.
PS. Should I replace the files in my trash?