Hey, thanks for the report. This matches a known bug affecting chat history during updates.
Your data still exists in %APPDATA\Cursor\User\workspaceStorage\state.vscdb (as you confirmed), but Cursor can’t read it due to a migration failure.
Recovery solution:
A community member created a working recovery method here: Chat stuck on “Loading Chat” — cannot access previous conversation - #16 by Danivisit
The guide includes full step-by-step instructions with file paths and commands.
For the future: Install the SpecStory extension for automatic backups.