When trying to launch Picard after installing v3.0 a "Picard terminated unexpectedly" pop up is displayed, see attached.

Log file contents:

Traceback (most recent call last):
  File "picard\config.py", line 868, in _run_upgrade_hooks
  File "picard\config_upgrade.py", line 371, in hook
  File "picard\config_upgrade.py", line 411, in _run_settings_upgrade_on_config
  File "picard\config_upgrade_hooks.py", line 829, in convert_release_type_scores_to_lists
TypeError: 'NoneType' object is not iterable

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "tagger.py", line 12, in <module>
  File "picard\tagger.py", line 1897, in main
  File "picard\tagger.py", line 261, in _init_
  File "picard\config_upgrade.py", line 390, in run_config_upgrades
  File "picard\config.py", line 834, in run_upgrade_hooks
  File "picard\config.py", line 870, in _run_upgrade_hooks
picard.config.ConfigUpgradeError: Error during config upgrade from version 3.0.0.beta7 to 3.0.0.beta8 using upgrade_3.0.0.beta8()