As you can see in the FAQ section at the official web page, new OS installations may alter a disk format and it is recommended to unlock the folders and take backups before reinstalling the OS. Since the file/folder is locked and you don't have a backup, remove Instant Lock using Add or Remove Programs feature and the password used to lock your files and check the (F:) directory. If you can't find it, try using the search engine from the Start menu. Alternatively, you can use support@instantlock.net email address to get in touch with the support team.
