[Plugin: Visual Form Builder] Multiple site

Just a quick question i have been using your free plugin on a few of my sites for quite a while now and really happy recently i needed to export the data and have paid for the pro version i have had some trouble with exporting them and im sure your working on this (read the other threads)

i have 2 quick question is there a work around such as making sure each field has a different name?

Also can i up load the pro version to all of my sites or do i need to pay for each website?

Cheers

https://www.ads-software.com/extend/plugins/visual-form-builder/