Sorry that I cannot accurately predict the fate of data that you have apparently lost.
Always Be Prepared
Sometimes, the following two steps, are sufficient to get Brave Browser running properly.
With BB not running, delete the ‘Caches’ folder, and delete the ‘Cookies’ file.
Caches (folder):
%LOCALAPPDATA%\BraveSoftware\Brave-Browser\User Data\Default\Cache\
Cookies (file):
%LOCALAPPDATA%\BraveSoftware\Brave-Browser\User Data\Default\Cookies
Clear cookies, cache, history, etc.
In a Brave Browser New Window, go to:
brave://settings/clearBrowserData
Select the Advanced tab
Set Time range to “All time”
ENABLE everything except:
- Passwords and other sign-in data
(Myself, I would NOT make that exception)
(because I would have a backup prepared.)
(In other words, be prepared.)
Click on the “Clear data” button
ROUTINE MAINTENANCE for WINDOWS OS USERS
- Back up the always-important “BraveSoftware” folder
- Back up bookmarks (and tabs, as bookmarks)
- Back up passwords
- Back up Windows Registry
- Create System Restore Point
And keep track of your backups. Be sure to store a copy on an external drive.
Maybe create a folder: “BraveSoftwareBackups”
And name each backup, contained therein, in chronological order:
20241231_Tuesday_BraveSoftwareBackup.html"