We are not creating a standalone app for Windows or Mac now, but this may be an interesting project too! Any volunteers?
I know a person who can help and do it. Are you ready to pay it?
Not at the moment. We can help that person to make the project open source and promote him/her as a programmer. But we are not ready to pay.
If you can help and promote his as a programmer, I think it will be even better than a one-time reward, cause any novice freelancer or programmer needs stability.