New message link issue

hi
i am using Cartpauj PM for private messaging, i configured it, it was working well, but now the issue is when i logged in and click new message it take me to a page
MYDOMAIN.com/ORDERNOW/?pmaction=newmessage

instead of
MYDOMAIN.com/conversation/?pmaction=newmessage

how to fix this

https://wordpress.org/plugins/devnia-pm-based-on-cartpauj-pm/