I just got the payment plugin. However when i installed it there seems to be some sort of conflict with my theme Exiria. Where before clicking on Exiria Options in the admin side panel took me to the theme's options, now it shows a popout menu called Payments which takes me to http://mysite.com/admin/vfb-payments.
Also in the payments section of VFBpro i see this
Payments Add-on detected
It is recommended you use the Payments Add-on to collect payments.
which links to a page that says nothing but
You do not have sufficient permissions to access this page.