Houzez theme backend searching

Hello there. We are using the Houzez theme for some months, but recently we notice a HUGE problem. The backend search option (look at the picture) does not find the information in the PRIVATE NOTE section (there we write the property adress and the owners phone number). One month before it worked, and now it does not. The problem is that our purchase code is already expired and i cant make a ticket to the author @favethemes