All files have been deleted from android application - Android

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http://stackoverflow.com – I signed my android application and created a KeyStore and converted it into an APK file. When I did this all of my projects within eclipse converted into some weird format. All my package names have been changed to folders and all the .java files have been changed to .class files. When I try to refresh the main folder it says that the location for my project has been deleted but when I go into my workspace through the computer's desktop it shows my project and it has all the .java files. I tried importing the folder from my workspace into eclipse but I get an error saying the project name is (HowTos)