Favorites and searchfunction =/ Help!

Not that long ago all of my favorites disappeared, and it only shows the message: No internet games responded to the query.
This is really bothering me!! And it also seems like the search has become worse :/ Hardly finds any servers and it takes a lot of time etc.

What is wrong? Does anyone know what I can do about it?
I thought that maybe it was Hamachi that had done this, but doesn't look like it.