I have never tried just the YaRSS config file, but often I have copied the entire deluge settings folder to new installs or other computers. Did you copy the YaRSS.conf file and the YaRSS.conf~ file? I believe the tilda is just a backup, but I would copy both just to be sure. Also, maybe try copyin...

there is a way to export my configuration and after that import on a new? You mean copy the config to a new machine or config directory? The YaRSS2 config is stored in yarss2.conf in the deluge config directory. Just copy that file to the new destination. Hello, I made a copy of my yarss2.conf file...