Hi J,
To redirect the vendor from the wcmp_vendor_dashboard to vendor's wordpress backend, make changes in the class-wcmp-vendor-dashboard.php available under classes folder of the plugin.
And to redirect vendors from the dc-vendor-shipping to wcmp_vendor_shipping, please use the shared code snippet - http://pastebin.com/gKp9ab06, in the theme's function.php file.
Hope the shared information will be helpful.
Thanks,
Rimpa