Every time I open my world, it loads halfway and then takes me to the homescreen (basically crashes)

Okay so recently I have been having trouble opening my Minecraft pocket edition world; when I open my world it loads halfway and then just takes me to my home screen (it doesn't just close it actually crashes) I have tried uninstalling and reinstalling, and nothing happens.. I have a few backups of the same world saved on my computer so I uploaded the last backup's files to my ipad and it easily opened. When I reverted back to the current files I have (the files that made me crash) it closed again when I tried opening it. I think there is something wrong with the ldb files or maybe they are corrupted. I have tried many times weeding out which one might be corrupted and still nothing works. Can anyone please help me? This is my favorite minecraft world and I've made so many creations in it along with friends.