Any way around a known issue when deploying to WP8? Number at start of project.

I started a project that has a number at the start of the name (actually, it's all numbers). When deploying to Windows Phone 8.1 I get an error saying that Class='6filename.app' is not a valid class name. I've tried adding a letter to the start of the solution and filenames in Visual Studio and at other places but it still tries to create the class with the orginal filename.

This is a known issue that's been fixed, according to the issue tracker but it seems that the fix isn't available until 5.2.1. Any idea how to get around it for now? WP8 is currently my primary mobile testing platform.