[capfuturo]

Thanks for the clarification.

I thought that the add-on would inject a web url to the artwork into my library Db, in my case in MySQL, instead of actually downloading the file (which appears to be to the \temp folder).

That is basically to inject: "...AD will just create artwork entries for your movies in the media library that reference remote (web-based) artwork..." it will just not download and place the artwork alongside your movies. Fundamental in all this is, however, to have the right settings in your AD's config panel. Mind that the images still need to be cached in Kodi.

Like many other add-ons that involves fetching online content, AD uses a temp folder. Martijn would be the most appropriate man to ask for the full nature of this temp folder or aspects of it which remain unclear to you, as well as if there is any chance to have certain control over it, such as limit/prevent it from rapidly increasing its size that could be compatible with certain storage-limited system.

EDIT: @DruTheFu: could you please do an AD run and collect a Debug log for that. Check if in the log you see any error after AD tries to clean the temp files, right after:

Code:

DEBUG: Artwork Downloader: Finished download
DEBUG: Artwork Downloader: Cleaning up temp files

See if somewhere you are getting anything like:

Code:

ERROR: XFILE::CDirectory::Remove - Error removing ...\userdata\addon_data\script.artwork.download​er\temp