You can try going into Settings > Video > Clean Library.. which is visible when you change the settings view made to a level higher than standard (don't remember the exact minimum level).
Then rescan library either by enabling Settings > Video > Update Library on Startup or by navigating to the folder in files and doing C > Scan for New Content.
Also be sure to verify the content type is set (TV/Movies) and the scraper settings are configured as desired.
If that doesn't work it may mean the naming scheme will need to be updated to a model with
S01E02 or a form of that. If that still doesn't work, you'll need to add custom regex formulas in
advancedsettings.xml to pick up the details necessary for Kodi to recognize the content.
Kodi can be fairly picky with weirdly named files. See http://kodi.wiki/view/Naming_video_files/TV_shows for more details.
Personally I've had no luck with using NFO's for detection but see http://kodi.wiki/view/NFO_files for more details.
Create a text file with a text editor (e.g. notepad) with exactly the
same name as the movie file (if all movies in one dir; in case each
movie has its own folder, place the .nfo file there and the name does
not matter). The extension has to be .nfo (e.g. Hellboy (2004)