Depends how many movies you have! I have multtiple profiles and about 2000 films so it was a bit of a pain. Glad I'm not the only one though. Thanks for the reply!
Next before to uninstall Kodi just save your userdata /sdcard/Android/data/org.xbmc.kodi/files/.kodi/userdata/*
Fast way for testing Kodi nightly build is just to rename org.xbmc.kodi before to uninstall
1. rename /sdcard/Android/data/org.xbmc.kodi to /sdcard/Android/data/org.xbmc.kodi.save
2. uninstall Kodi
3. install any version you like (Kodi nightly build) if you are of FW 1.0.7/1.0.8 CS mod FW or just reboot to get Kodi 14.2 for FW 1.0.8/1.0.8 CS mod FW
4. rename back /sdcard/Android/data/org.xbmc.kodi.save to /sdcard/Android/data/org.xbmc.kodi
5. open Kodi and all your library and profile well be inside.
Of course this is dirty way but is fast and you don't have to spend time on rebuild source, scan contend and fixing mistake of matching movie.