purchase add ons
Are the add-ons tied to the domain name? If I buy the add-ons and 6 months later change the project/domain name the forums use, how can I reuse them?
Also, what is the letter P for at the bottom of the editor when creating posts?
yes, you should disconnect the license from the previous website then activate it on the new website. the "Disconnect License" button is located next to the Deactivate button in Dashboard > Plugins admin page:
If the domain is already changed you should contact gVectors Team support via support[at]gvectors.com email address and ask them to reset the license key activation and let you activate them on the new website.