Checked on 2014 and it works fine
Dim swApp As SldWorks.SldWorks
Set swApp = Application.SldWorks
Yes, you are right, its working in 2014, but unfortunately it's not working in 2015.
Not sure if this is expected behavior or something broke down in the API as I'm seeing same results on 2015.
Also from 2015 on wards the .mdb has been changed to .sldedb