My tvh user (hts) has /home/hts set as the home dir, same as always. After updating to a newer build, /home/hts/.hts/tvheadend gets created but my config has been moved to the new location in /home/hts/.config/hts already and tvh confid in /etc/default points to the new one too.
So everytime I have to stop the service, remove .hts and start again for tvh recognizing my config.