i have accidently deleted some folders in my document-folder. My home-folder is encrypted by default (when i installed Mint, i decided to encrypt this folder in the install-process). So i recovered all deleted data with PhotoRec and got the folder "recup_dir.1" with a "lock":
I'm not sure how to decrypt the files, they were probably encrypted using encfs so you might look that up. But the lock means that you don't have permission to access the folder, it was probably created as root. You can open it as root or change the permissions to your user (also as root) then you can access the folder but you will still need to decrypt the files. To change the folder permissions run sudo chown -R user recup_dir.1 where user is your username.
Not sure how well it's going to work after recovering the files, if you still have the directory structure and the encfs xml file you should just be able to run something like encfs /path/to/old/home/folder /path/to/mount/point then it will ask for the passphrase and you can access the files from the mount point (use /mnt or create a folder and use that)
Check the permissions: right click - Properties than the 2nd tab; if there it reads root (or anything else) you will need to open it as the user root; If it is your user it might say read only; than change it to read+write.
If you want your filemanager with root privileges use "gksudo nemo" in a terminal. That will give you the file browser with Administrative rights.