These applications are created in a way that when you protect a directory or file you don't have another unlocking possibility other than the password method. Also, when you formatted the computer, you also deleted files that "told" the application you were the owner. In this case, although you use the same password, the software does not recognize you anymore because it has no place to get the data from.
It's sad, but I believe you have lost the whole folder.
On the other hand, open My Computer > (Menu bar) Tools > Folder Options > View > Check "Show all hidden files and folders and browse the folder you have it locked. If you're lucky, you may enter the folder and copy the contents.
