Using this image myself for the last week, i can confirm this fix works.
-Ftp file to the /tmp folder
-Go in to addons panel (blue, blue)
-Select 'manual package install'
-Press 'ok' on the file, select 'yes' to install
-After file installation is complete(about 30 secs), select 'yes' when asked to restart enigma2.
enigma2-plugin-extensions-webinterface_working-edg-nemesis_silsila-dm800.ipk
