PC版dropboxがエラーで起動しない

bn.BUILD_KEY: Dropbox
bn.VERSION: 39.3.47
bn.DROPBOXEXT_VERSION: 19.0
bn.is_frozen: True
machine_id: failed
pid: 7176
cwd: u'C:\\Program Files (x86)\\Dropbox\\Client'
real_path=u'C:\\Program Files (x86)\\Dropbox\\Client'
mode=040777 uid=0 gid=0
parent mode=040777 uid=0 gid=0
HOME: None
appdata: u'C:\\Users\\BABYLONSYSTEM\\AppData\\Local\\Dropbox\\instance1'
real_path=u'C:\\Users\\BABYLONSYSTEM\\AppData\\Local\\Dropbox\\instance1'
mode=040777 uid=0 gid=0
parent mode=040777 uid=0 gid=0
dropbox_path: u'C:\\Users\\BABYLONSYSTEM\\Dropbox'
real_path=u'C:\\Users\\BABYLONSYSTEM\\Dropbox'
mode=040555 uid=0 gid=0
parent mode=040777 uid=0 gid=0
sys_executable: 'C:\\Program Files (x86)\\Dropbox\\Client\\Dropbox.exe'
real_path='C:\\Program Files (x86)\\Dropbox\\Client\\Dropbox.exe'
mode=0100777 uid=0 gid=0
parent mode=040777 uid=0 gid=0
trace.__file__: 'C:\\Program Files (x86)\\Dropbox\\Client\\python-packages-27.zip\\dropbox\\client\\ui\\common\\boot_error.pyc'
real_path='C:\\Program Files (x86)\\Dropbox\\Client\\python-packages-27.zip\\dropbox\\client\\ui\\common\\boot_error.pyc'
not found
parent not found
TMP: G:TEMP
TEMP: G:TEMP
tempdir: 'c:\\temp'
real_path='c:\\temp'
mode=040777 uid=0 gid=0
parent mode=040777 uid=0 gid=0
Traceback (most recent call last):
File "dropbox\client\main.pyc", line 715, in wrapper
File "dropbox\client\main.pyc", line 5192, in finish_dropbox_boot
File "dropbox\client\main.pyc", line 4968, in _init_components_for_account
File "dropbox\client\main.pyc", line 5461, in finish_sync_engine_setup_for_account
File "dropbox\client\configuration\manager.pyc", line 391, in update_account_info
File "dropbox\client\config.pyc", line 83, in __setitem__
File "dropbox\sqlite3_helpers.pyc", line 311, in execute
File "dropbox\sqlite3_helpers.pyc", line 276, in _raise_better_operational_exception
File "dropbox\sqlite3_helpers.pyc", line 306, in execute
UnableToOpenSQLiteDatabase: unable to open database file

エラーのテキストです。

環境は

Windows10Pro(1709)です