OK a new data point. I have an upgraded from Win7 pro copy of Win10 (which I don't like and don't use) which is probably at a patch level at least a year or more old. It didn't ever have Fritzing on it, so I just installed the 64 bit zip file. Starting Fritzing I got the "we need to delete these files to do the parts update" which I approved, it then did the parts update and closed Fritzing. When I restarted fritzing and clicked the search hourglass and search comes up and works as expected. So search does work on Win10. I'll leave the machine alone for a while (I have several Image may be NSFW.
Clik here to view. ) to do updates and see if an update kills it. Note Old_Grey's post just before this that deleting the directories has worked for other people in the past although someone here tried that without success, I still think that is the most liekly cause of this. I may try loading a part that I know hangs fritzing and see if that breaks it as well a bit later as well if patches don't break it (I can see traffic on my adsl modem probably indicating the other machine is loading patches Image may be NSFW.
Clik here to view. ).
Peter