Upgraded and cannot open Anki anymore

Anki Desktop
1

Hi everyone,
I am a pretty new user to Anki. I went to upgrade the version today on my Mac desktop and this is the error I am getting.
I do not see a “tools” section to check the database.
any help is appreciated

Error
An error occurred. Please use Tools > Check Database to see if that fixes the problem.
If problems persist, please report the problem on our support site. Please copy and paste the information below into your report.
Anki 2.1.33 (3f403040) Python 3.8.0 Qt 5.14.2 PyQt 5.14.2
Platform: Mac 10.14.6
Flags: frz=True ao=False sv=?
Add-ons, last update check: 2021-01-13 12:03:52

Caught exception:
Traceback (most recent call last):
File “aqt/main.py”, line 495, in loadCollection
File “aqt/main.py”, line 530, in _loadCollection
File “anki/collection.py”, line 55, in init
File “anki/collection.py”, line 267, in reopen
File “anki/rsbackend_gen.py”, line 468, in open_collection
File “anki/rsbackend.py”, line 265, in _run_command
anki.rsbackend.DBError: DBError { info: “”, kind: FileTooNew }

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File “aqt/main.py”, line 1094, in onPrefs
File “aqt/init.py”, line 105, in open
File “aqt/preferences.py”, line 24, in init
AttributeError: ‘NoneType’ object has no attribute ‘backend’

2

This error typically arises, if you upgrade Anki, and afterwards want to downgrade again.
Did you maybe open the old Anki installation again, or you have both installed on the computer?

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