Hello Ayanrc, and welcome to Seven Forums.
Yep, green file names means that the file has been encrypted using the EFS file encryption
feature included in Windows 7. Unless you backed up the EFS certificate
somewhere safe after encrypting the files, you will not be able to restore that same EFS certificate
and be able to have access to the encrypted files again.
You may be out of luck unless you backed up your EFS certificate.
You could see if the 30 day free trial of the Advanced EFS Data Recovery
program may be able to decrypt the files.