Source Code is a year old and not up to date with current releases. Please update.
I saw a discussion about this, and your mention of GIT not being easy. However GIT is fairly easy to use, especially if you are using Visual Studio 2012 with the Microsoft GIT extension or Visual Studio 2013 with GIT built in. No command line required any more there are tons of GUI clients.
If you are not a fan of GIT see if you can convert your project to TFS or Mercurial, GIT is not a requirement for using CodePlex, as a mater of fact GIT on CodePlex is kind of crappy, if you want to use GIT with an opensource project I would recommend GitHub. TFS is the best source control for CodePlex if you are going to use Visual Studio as your development environment, as it will just work.
Anyway, in order to be an open source hosted project on CodePlex you really need to keep the source in sync with what is being released.
Comments: That doesn't really address getting the source up to date in your project. However, VS 2010 has GIT Extensions, and it supports TFS out of the box. All VS going back to 2005 have supported TFS with an provider added and 2010 it was built in. I don't understand why you are not checking in the code, I assume you are using source control for development and you have this repository to use, why not just make this your main and only source repository. If you are not using source control on a regular basis I highly recommend it, and you have one for free right here to use.
I saw a discussion about this, and your mention of GIT not being easy. However GIT is fairly easy to use, especially if you are using Visual Studio 2012 with the Microsoft GIT extension or Visual Studio 2013 with GIT built in. No command line required any more there are tons of GUI clients.
If you are not a fan of GIT see if you can convert your project to TFS or Mercurial, GIT is not a requirement for using CodePlex, as a mater of fact GIT on CodePlex is kind of crappy, if you want to use GIT with an opensource project I would recommend GitHub. TFS is the best source control for CodePlex if you are going to use Visual Studio as your development environment, as it will just work.
Anyway, in order to be an open source hosted project on CodePlex you really need to keep the source in sync with what is being released.
Comments: That doesn't really address getting the source up to date in your project. However, VS 2010 has GIT Extensions, and it supports TFS out of the box. All VS going back to 2005 have supported TFS with an provider added and 2010 it was built in. I don't understand why you are not checking in the code, I assume you are using source control for development and you have this repository to use, why not just make this your main and only source repository. If you are not using source control on a regular basis I highly recommend it, and you have one for free right here to use.