I have a similar issue: after upgrading—or sometimes，the cursor occasionally becomes unresponsive. Under the Run menu, the only available button is Install Additional Debuggers; the Extensions appears empty, and .ipynb files fail to display.
I have tried uninstalling and reinstalling Cursor IDE, but the problem persists; I even installed it on a different computer, only to meet the same issue. I have already tried the Cursor IDE User version as well, not work.
I previously posted about a similar problem, which was resolved by a reinstallation at the time; however, that solution did not work this time.
Version: 3.2.11 (system setup)
VSCode Version: 1.105.1
Commit: e9ee1339915a927dfb2df4a836dd9c8337e17cc0
Date: 2026-04-24T14:36:47.933Z
Layout: editor
Build Type: Stable
Release Track: Default
Electron: 39.8.1
Chromium: 142.0.7444.265
Node.js: 22.22.1
V8: 14.2.231.22-electron.0
OS: Windows_NT x64 10.0.19045