When working at the editor level, the project modules are compiled as DLLs that are loaded by the editor. I’m assuming here that you are using the default settings based on the content of the log.
I suspect that there might be a problem with the project settings (the VS project). If you look in the Debugging panel for the DebugGame_editor target, you should make sure that the “Command Arguments” field contains the name of the project as the argument.
Can you please share the log file if this doesn’t help?
I’m not familiar with this extension but I would recommend that you have a look at UnrealVS. It a custom solution that offer a couple of extra Unreal related features including the management of commandline argument from a toolbar.