Auto installer of nitdroid-0.0.9 has not released yet. You should try the manual instructions they very easy.

Just delete the nitdroid-0.0.8 and then start the instructions
To delete the existing nitdroid type in x-terminal

root
mount /dev/mmcblk*p* /and (* you have to type where you have mounted nitdroid files for ex- mmcblk0p2 or mmcblk1p2)
cd /
umount /and
and just delete the file and file (by using filbox)
Now follow the instructions