I've been having a few problems with Moviewiz recently. I understand from other posts that you're busy at the moment, and I'm not requesting a quick fix for these issues, but it would be fantastic if you could look into them when you have the time.
The biggest problem is with titles not being recognized despite the filenames being exact matches for the name on IMDB. Often Moviewiz will return some obscure short film, or series with the same or similar title despite the year being different. In almost every case, when clicking on 'Find Alternatives', the correct result is the first on the list.
Here's some examples of exact filenames, minus extensions, so hopefully you can reproduce the problem:
In the Loop (2009)
No Country For Old Men (2009)
Sate of Play (2009)
This is England (2006)
Back to the Future (1985)
Rise of the Footsoldier (2007)
The second issue is with image lookups from themoviedb.org. I'm getting a lot of backdrops returned, rather than posters. Backdrops are better than no image, but I think they should be last resort, and posters are available from themoviedb, and always come above backdrops on the list when performing a manual lookup.