Information on silk is backed up daily and can be restored from the command-line using the recover command. This opens an interactive program that accepts many Unix-like commands as well as backup-specific ones:

cd [<directory>]
Go to the specified directory.
ls [<path>]
List files as they appear in the backup you are viewing.
versions [<path>]
List details about backups of a file over time.
changetime <time>
View the most recent backup as of the given time.
add <path>
Add files to the list of things to be restored.
recover
Recover the currently added files.
help
Show information about available commands.