Settings export using an options page generated from the template isn't working

[segevfiner]

Steps to Reproduce:

1. Clone https://github.com/segevfiner/OptionsPageTest
2. Open it in Visual Studio and run it with debugging (F5).
3. Modify the option in OptionsPageTest in Tools -> Options.
4. Try to export the settings.
5. You will often get an error, and the MyOption will be missing from the exported vssettings file.

This uses SupportsProfile as the generated options page cs file tells you to, and I also tried settings a fixed Guid for the ComVisible(true) class (AFAIK it uses the class Guid to register it) but that didn't help either... I'd

Your settings were exported, but there were some errors.

Error 1:  Failed to export settings for 'General' [code 7009]