Repair your picture thumbnails in XBMC after moving them to a central repository

I recently migrated all of my thumbnails in XBMC Eden to a single share on my Synology NAS but had all sorts of grief afterwards with random missing thumbnails.

I finally got around to repairing the missing picture thumbs this evening and found that by simply renaming "\\xxx.xxx.xxx.xxx\Userdata\Database\Textures6.db" to "\\xxx.xxx.xxx.xxx\Userdata\Database\Textures6.old", this file is recreated and the picture thumbs will be regenerated.

P.S I tried regenerating the thumbs using the option menu in XBMC and this did not work.