No currently there'd be no way to tell the app to "be less picky". The app assumes you have properly named files. Yours are not. If you don't want to rename the files an alternate approach would be to import the files but don't actually scrape for metadata. Once done close LaunchBox and then use a text editor to manually adjust the XML files using a find and replace. You'd find "<Title>800 " and replace with "<Title>" then save and close the file and reopen LaunchBox. When you open it the names should reflect the change and then you can select all in that platform and navigate to Tools > Download > Download Metadata and Media and then apply DB matches, metadata, and scrape media for the the titles you've imported.