I've been experiencing the same issue ever since the upgrade. My workaround to adding games at the moment is to turn debugging on/off (depending on what it's currently set to) and try importing the game again (that works).
1) Is the location your importing from on the same drive as the LaunchBox install? No, games are on an external drive. Launchbox/Emulators are on the internal drive.
2) Is the location your importing from IN the LaunchBox folder? No, games are on an external drive
3) What import method are you using to import your games? Import wizard, drag/drop, something else? Import Wizard
4) What folder is the games folder of the platform you're importing games to? Does that folder actually exist? Yes. These folders have existed for years and haven't had a problem until the new release.
5) What platform are you importing for? What is it's scrape as value set as if not a default platform name? Had the issue on 3 games I've tried importing since the update (PSP, Neo Geo CD & Arcade).