***.Designer.cs for .resx file doesn't update when using standalone ResXManager

When I add a key to a resx file using the standalone version of ResXManager, the linked *.Designer.cs file isn't updated to reflect the change. When I make the same change using the Visual Studio extension it works file.

Visual Studio 2022 Version 17.4.3
ResXManager version 1.73.5614.0 (same version installed in Visual Studio and Standalone)

**To Reproduce**
1. Open the standalone version of ResXManager
2. Select a folder. I've chosen the folder that contains my solution.
3. Choose an existing globalization file, we'll choose "Foo".
4. Click + to add a new entry
5. Save changes
6. New entry is added to Foo.resx. No changes are made to Foo.Designer.cs

**Expected behavior**
6. New entry is added to both Foo.resx and Foo.Designer.cs