How do I install modules into my project?

[Shadowblitz16 via Digitalmars-d-learn]

how do I install modules into my project?
I have installed dub and tried doing "dub add tkd" and "dub 
install tkd" to install this library 
https://github.com/nomad-software/tkd however I get this error 
when building..

Severity Code   Description     Project File    Line    Suppression State
Error	module `tkdapplication` is in file 'tkd\tkdapplication.d' 
which cannot be read

I am using visual d for visual studio 2019