The config migration seems to fail. When trying to update from a previous alpha build, I get:
Traceback (most recent call last):
File "config\__init__.pyc", line 571, in _initBaseConf
File "config\__init__.pyc", line 605, in _loadConfig
File "config\__init__.pyc", line 601, in _loadConfig
File "config\profileUpgrader.pyc", line 24, in upgrade
File "config\profileUpgrader.pyc", line 41, in _doConfigUpgrade
File "config\profileUpgradeSteps.pyc", line 368, in upgradeConfigFrom_10_to_11
File "configobj\__init__.pyc", line 508, in __getitem__
KeyError: 'excludedDisplays'
Originally posted by @bramd in #15200 (comment)