Import of RDG Files Broken for new version of RDCMan

When importing from RDG, the following error is presented:

2016-02-12 09:38:30,887 [1] ERROR- UI.Window.Tree.cMenTreeToolsImportExportImportFromRDGFiles_Click failed.
Unsupported schema version (3).

Switching the schema version in the RDG Man File to 1 or 2 generates the following error:

2016-02-12 09:51:38,719 [1] ERROR- UI.Window.Tree.cMenTreeToolsImportExportImportFromRDGFiles_Click failed.
Object reference not set to an instance of an object.