I see that test.xxxxx.org registered on my account (ID: 5509764) on your site.
(1) How can I register my live site xxxxx.org (without test dot in front of the domain name). I entered the correct license key on my live site, but my live site is not registered on my account.
(2) Do I need to register test/production/development sites of my live site to test Front End PM Pro? What are the acceptable subdomain names for that testing? While Front End PM Pro at a testing site is being tested, will Front End PM Pro work at the live site simultaneously?
(3) Can I register my live site and my test site(s) at the same time?
I still cannot see your video.
May you please let me know if this plugin is active in your main website? What issue you are facing? Is not it activate in your main website?
If you cannot activate in main site, you can deactivate in test site then activate in main site. Then again activate in test site.