BUG: Can't exclude a folder from search

### Checks

- [x] I have checked that this issue has not already been reported.

- [x] I am using the latest version of Flow Launcher.

- [ ] I am using the prerelease version of Flow Launcher.

### Problem Description

Windows 10, non-admin user. Version of Flow Launcher installed just today.
1. Attempted to use in-built facility 'Index Search Excluded Paths': Text box appears but could not paste folder path into it.
2. Attempted to modify C:\Users\\AppData\Roaming\FlowLauncher\Settings\Settings.json with the following lines. No difference.
"ExcludedPaths": [
[folder path I want to exclude]
]

### To Reproduce

1. ...
2. ...
3. ...

### Screenshots

_No response_

### Flow Launcher Version

1.20.1

### Windows Build Number

Microsoft Windows [Version 10.0.19045.5965]

### Error Log

```shell

Replace this line with the important log contents.

```