recently I added a new alias to my keystore to sign my app.
Now I lost the new generated file with the alias, but remember the password and the alias name and have a
http://tim12332013.blogspot.tw/2014/10/corona-sdk-android-keystore-lost-alias.html
look it may help you
keytool -list -v -keystore X:/XXXX /XXXX.keystore -storepass XXXX