What I observed is that according to the Plugin .ipk file structure, some files are meant to go into tmp directory,from where, if not mistaken, they will disappear upon first reboot.
Please correct me if I'm wrong and many thanks.
The plugin requires a few additional features. However, this must be set to the image Feed available! Otherwise, they can not be installed!
This can lead to an error during installation and thereby the plugin does not work.
Install Telnet (Putty) and you this is indicated in case of problems.