Are you flashing OpenBh 5.0, or OpenBh5.1?
You don't need to re-flash your image, unless loading a new image, or updated version, like 5.0. to 5.1, to remove a plugin, like Kodi, just go into the plugins menu, and press the red button, to uninstall plugins.
If you post your crash log one of the developers can study it, and try to find the problem.