In the first post of the thread you link to.
https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=SRW98J8EGXPCY
===================================================
Branding-Free Option
I am now offering a branding-free option that you can purchase if you want to remove the "Flexile theme by Erik Swan" branding in the footer. The price is $20 and gives you the right to remove the Flexile branding from one (1) installation of Flexile and/or
Flexile Dark on one forum.
This is a branding-free license only.
Purchasing the branding-free option does not entitle you to extra support or priority support. I will try to answer your questions as best I can here in this thread, but in terms of support you are no different than anyone else.
If you have purchased a branding-free license and need help removing the branding, please PM me for branding removal instructions.