[iMak]

Rename your simplecache.db in c:\Users\**\AppData\Roaming\Kodi\userdata\addon_data\script.module.simplecache\
in "0simplecache.db".Start Kodi and see if you now have art and info (need some time to load from online scraper, be pation).

If you have art then is all ok.You can roll beck your simplecache.db just remove 0 from name.
This was just for test...if you liked you can keep new simplecache.db

I did, still the same, no artwork showing!