@atsaloli Could you please keep threads on topic? This thread was originally about the lock command, not about custom searches. There's also no need to tag me specifically as there are many very knowledgeable forum members who can help with simple questions.
You can sync or back up your entire preferences:
https://www.alfredapp.com/help/advanced/sync/
Alternatively, you can set up Time Machine as a backup, or manually copy the Alfred.alfredpreferences file from ~/Library/Application Support/Alfred/ to a location of your choice to back it up.
