TV model is ue32f4500, software version is 2127
Looks like there was an update, after which Samsung Apps application dissappeared from Smart Hub. When going to Smart Hub > More apps it just quits from Smart Hub. When going to Smart Hub > Multimedia with Youtube video suggestions and clicking on any video it suggests to download Youtube, but when clicking OK nothing happens.
Already tried to reset Smart Hub and TV to factory defaults, doesnt help.