[Cura 4.4 error at start]

Hi.

I've updated Cura form 4.0.0 and 4.2.0 to 4.4 on 2 computers and it's not starting on both. I've tried Administrator rights and Windows 8 compatibility and still nothing.

The errors shown:

 

Traceback (most recent call last):

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\cura\Machines\Models\IntentCategoryModel.py", line 101, in _update

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\cura\Machines\Models\IntentModel.py", line 40, in __init__

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\cura\Machines\Models\IntentModel.py", line 66, in _update

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\cura\Machines\Models\IntentModel.py", line 105, in _getActiveMaterials

KeyError: 'empty_material'

 

 

And logs:

Thread 0x0000048c (most recent call first):

File "threading.py", line 297 in wait

File "zeroconf.py", line 1569 in wait

File "zeroconf.py", line 1153 in run

File "threading.py", line 914 in _bootstrap_inner

File "threading.py", line 882 in _bootstrap

 

Thread 0x00002428 (most recent call first):

File "threading.py", line 297 in wait

File "threading.py", line 549 in wait

File "C:\Program Files\Ultimaker Cura 4.4\plugins\UM3NetworkPrinting\src\Network\ZeroConfClient.py", line 74 in _handleOnServiceChangedRequests

File "threading.py", line 862 in run

File "threading.py", line 914 in _bootstrap_inner

File "threading.py", line 882 in _bootstrap

 

Thread 0x00001fb4 (most recent call first):

File "threading.py", line 297 in wait

File "zeroconf.py", line 1569 in wait

File "zeroconf.py", line 1017 in run

File "threading.py", line 914 in _bootstrap_inner

File "threading.py", line 882 in _bootstrap

 

Thread 0x00000994 (most recent call first):

File "zeroconf.py", line 946 in run

File "threading.py", line 914 in _bootstrap_inner

File "threading.py", line 882 in _bootstrap

 

Thread 0x0000257c (most recent call first):

File "C:\Program Files\Ultimaker Cura 4.4\plugins\RemovableDriveOutputDevice\RemovableDrivePlugin.py", line 61 in _updateThread

File "threading.py", line 862 in run

File "threading.py", line 914 in _bootstrap_inner

File "threading.py", line 882 in _bootstrap

 

Thread 0x00001ca0 (most recent call first):

File "C:\Program Files\Ultimaker Cura 4.4\plugins\USBPrinting\USBPrinterOutputDeviceManager.py", line 86 in _updateThread

File "threading.py", line 862 in run

File "threading.py", line 914 in _bootstrap_inner

File "threading.py", line 882 in _bootstrap

 

Thread 0x00002710 (most recent call first):

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\Backend\Backend.py", line 150 in _storeStderrToLogThread

File "threading.py", line 862 in run

File "threading.py", line 914 in _bootstrap_inner

File "threading.py", line 882 in _bootstrap

 

Thread 0x0000188c (most recent call first):

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\Backend\Backend.py", line 138 in _storeOutputToLogThread

File "threading.py", line 862 in run

File "threading.py", line 914 in _bootstrap_inner

File "threading.py", line 882 in _bootstrap

 

Thread 0x00001edc (most recent call first):

File "threading.py", line 293 in wait

File "threading.py", line 424 in acquire

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\JobQueue.py", line 86 in _nextJob

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\JobQueue.py", line 112 in run

File "threading.py", line 914 in _bootstrap_inner

File "threading.py", line 882 in _bootstrap

 

Thread 0x00002578 (most recent call first):

File "threading.py", line 293 in wait

File "threading.py", line 424 in acquire

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\JobQueue.py", line 86 in _nextJob

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\JobQueue.py", line 112 in run

File "threading.py", line 914 in _bootstrap_inner

File "threading.py", line 882 in _bootstrap

 

Thread 0x00001a68 (most recent call first):

File "threading.py", line 293 in wait

File "threading.py", line 424 in acquire

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\JobQueue.py", line 86 in _nextJob

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\JobQueue.py", line 112 in run

File "threading.py", line 914 in _bootstrap_inner

File "threading.py", line 882 in _bootstrap

 

Thread 0x00000668 (most recent call first):

File "threading.py", line 293 in wait

File "threading.py", line 424 in acquire

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\JobQueue.py", line 86 in _nextJob

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\JobQueue.py", line 112 in run

File "threading.py", line 914 in _bootstrap_inner

File "threading.py", line 882 in _bootstrap

 

Current thread 0x00002608 (most recent call first):

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\cura\CrashHandler.py", line 306 in _logInfoWidget

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\cura\CrashHandler.py", line 156 in _createDialog

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\cura\CrashHandler.py", line 77 in __init__

File "X:\4.4-exe\build\inst\bin\cura_app.py", line 111 in exceptHook

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\cura\CrashHandler.py", line 391 in _show

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\Event.py", line 189 in call

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\Qt\QtApplication.py", line 428 in event

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\cura\CuraApplication.py", line 1003 in event

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\cura\CrashHandler.py", line 391 in _show

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\Event.py", line 189 in call

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\Qt\QtApplication.py", line 428 in event

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\cura\CuraApplication.py", line 1003 in event

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\UM\Qt\QtApplication.py", line 341 in exec_

File "X:\4.4-exe\build\inst\lib\python3.5\site-packages\cura\CuraApplication.py", line 804 in run

File "X:\4.4-exe\build\inst\bin\cura_app.py", line 180 in <module>

File "Console.py", line 24 in <module>

File "<frozen importlib._bootstrap>", line 634 in _load_backward_compatible

File "<frozen importlib._bootstrap>", line 664 in _load_unlocked

File "<frozen importlib._bootstrap>", line 957 in _find_and_load_unlocked

File "<frozen importlib._bootstrap>", line 968 in _find_and_load

File "__startup__.py", line 12 in <module>

File "<frozen importlib._bootstrap>", line 634 in _load_backward_compatible

File "<frozen importlib._bootstrap>", line 664 in _load_unlocked

File "<frozen importlib._bootstrap>", line 957 in _find_and_load_unlocked

File "<frozen importlib._bootstrap>", line 968 in _find_and_load

 

What can I do?

 

Thanks for help in advance.