He probado a reinstalar limpiando todos (creo) los ficheros relacionados y los permisos sin resultado.
Adjunto la información del mensaje
bn.BUILD_KEY: Dropbox
bn.VERSION: 139.4.4896
bn.constants.WINDOWS_SHELL_EXT_VERSION: 51
bn.is_frozen: True
<información eliminada por razones de seguridad>
euid: 502
gid: 20
egid: 20
group_info: grp.struct_group(gr_name='staff', gr_passwd='*', gr_gid=20, gr_mem=['root'])
effective_group_info: grp.struct_group(gr_name='staff', gr_passwd='*', gr_gid=20, gr_mem=['root'])
DYLD_LIBRARY_PATH: None
cwd: '/'
real_path='/'
mode=0o40755 uid=0 gid=0
parent mode=0o40755 uid=0 gid=0
HOME: '/Users/DCS'
appdata: '/Users/DCS/.dropbox/instance1'
real_path='/Users/DCS/.dropbox/instance1'
mode=0o40700 uid=502 gid=20
parent mode=0o40755 uid=502 gid=20
dropbox_path: None
not found
parent not found
sys_executable: '/Applications/Dropbox.app/Contents/MacOS/Dropbox'
real_path='/Applications/Dropbox.app/Contents/MacOS/Dropbox'
mode=0o100755 uid=502 gid=20
parent mode=0o40755 uid=502 gid=20
trace.__file__: '/Applications/Dropbox.app/Contents/Resources/python-packages.zip/dropbox/client/ui/common/boot_error.pyc'
real_path='/Applications/Dropbox.app/Contents/Resources/python-packages.zip/dropbox/client/ui/common/boot_error.pyc'
not found
parent not found
tempdir: '/var/folders/3r/5m4btqdj1kq7hsjqqpwssvwr0000gp/T'
real_path='/private/var/folders/3r/5m4btqdj1kq7hsjqqpwssvwr0000gp/T'
mode=0o40700 uid=502 gid=20
parent mode=0o40755 uid=502 gid=20
Traceback (most recent call last):
File "dropbox/client/authentication/register_host_helper.pyc", line 479, in _try_register_host
File "dropbox/client/authentication/register_host_helper.pyc", line 945, in handle_changed_host_secret
File "dropbox/sync_root/helpers.pyc", line 367, in destroy_root_from_config
AssertionError