The thing that bothers me the most about a post like this is that it isn't specific enough.
The OP says he "erased" some files - but did he really? Or did he just delete them?
What kind of files were they? Word, text, pics, songs, movies - what?
Did he use ERASER to "erase" them - or something else?
If he did actually "erase' them with ERASER and then subsequent to that ran an ERASER "free-space" wipe (that was correctly set up) - then the answer is "No, your "files" are gone forever."
But I guess we'll never know since the OP never came back! (This kind of stuff drives me nuts). Pete