Hey, this is a known issue. It’s the third report in the last month. On Windows, Cursor tries to run an extensionless bash script directly via PowerShell, and Windows doesn’t know what to do with it, so it shows the “Select an app to open” dialog.
A detailed breakdown and a workaround using a PowerShell wrapper is here: Windows “Select an app to open” dialog triggers when opening AI chat Windows "Select an app to open" dialog triggers when opening AI chat (.sh file handler issue). It’s a post by @Emrah with a step by step fix using session-start.ps1.
The team knows that hooks from external plugins on Windows need platform aware handling. There’s no ETA yet, but your report helps with prioritization.
Closing as a duplicate. The full discussion and workaround are in the thread above. Let me know if the workaround doesn’t work.