thx for your post. I tried to solve the problem with your cli hint.
But i got an error information which i can`t solve right now.
(C:\ProgramData\Anaconda3) C:\WINDOWS\system32>conda update anaconda-navigator
Fetching package metadata .............
Solving package specifications: .
Package plan for installation in environment C:\ProgramData\Anaconda3:
The following packages will be UPDATED:
anaconda: 5.0.1-py36h8316230_2 --> custom-py36h363777c_0
anaconda-navigator: 1.6.9-py36hc720852_0 --> 1.6.12-py36hdad2993_0
conda: 4.3.30-py36h7e176b0_0 --> 4.4.10-py36_0
pycosat: 0.6.2-py36hf17546d_1 --> 0.6.3-py36h413d8a4_0
Proceed ([y]/n)? y
anaconda-custo 100% |###############################| Time: 0:00:00 1.29 MB/s
pycosat-0.6.3- 100% |###############################| Time: 0:00:00 1.20 MB/s
conda-4.4.10-p 100% |###############################| Time: 0:00:00 1.11 MB/s
anaconda-navig 100% |###############################| Time: 0:00:03 1.09 MB/s
DEBUG menuinst_win32:__init__(185): Menu: name: 'Anaconda${PY_VER} ${PLATFORM}', prefix: 'C:\ProgramData\Anaconda3', env_name: 'None', mode: 'None', used_mode: 'system'
DEBUG menuinst_win32:create(299): Shortcut cmd is C:\ProgramData\Anaconda3\pythonw.exe, args are ['C:\\ProgramData\\Anaconda3\\cwp.py', 'C:\\ProgramData\\Anaconda3', 'C:\\ProgramData\\Anaconda3\\pythonw.exe', 'C:\\ProgramData\\Anaconda3\\Scripts\\anaconda-navigator-script.py']
DEBUG menuinst_win32:__init__(185): Menu: name: 'Anaconda${PY_VER} ${PLATFORM}', prefix: 'C:\ProgramData\Anaconda3', env_name: 'None', mode: 'None', used_mode: 'system'
DEBUG menuinst_win32:create(299): Shortcut cmd is C:\ProgramData\Anaconda3\pythonw.exe, args are ['C:\\ProgramData\\Anaconda3\\cwp.py', 'C:\\ProgramData\\Anaconda3', 'C:\\ProgramData\\Anaconda3\\pythonw.exe', 'C:\\ProgramData\\Anaconda3\\Scripts\\anaconda-navigator-script.py']
(C:\ProgramData\Anaconda3) C:\WINDOWS\system32>
Would be glad about a hint ;).
Thx,
Irsan