My finding is that, if you tick "Archived posts", then Search does not work. Presumably becasue there is no archive as present. If you leave "Archived posts" blank then Search works.
I have not restored the archived posts following the database crash. I haven't figured out how the database keeps track of the archived posts, not hard I am sure but it is just finding the time to sit down and do it. Promise I will attack it soon. Nick