I´m sorry, the Forum is mainly for discussion between Sticky Password users. It´s maintained by the same team as Sticky Password e-mail customer support so it may take longer to get a reply directly from our team here if we have a lot of work on e-mail support. Please send us a message through one of the contact forms on the website if you require immediate reply directly from our team.
Regarding Yubikey, we plan to introduce two factor authorization at the end of this year. Unfortunately it won´t probably include Yubikey support.
Thank you for understanding.