You best option is the solution here
http://scn.sap.com/thread/3569444
Assuming you installed to the default directory the key file will probably be
01b700e7d6d8e4881d65502d2455d8a3_a11a375d-d203-420b-b331-b7694ccae2fd
If it doesn't exist you will need to figure out which filename it is by checking the files or moving them all and starting your server to see which is created. Then put back the others.
--Bill