Hello, I'm new to this browser. So far, it looks very promising. Setting my default homepage, however, was a fun puzzle to try and figure out.
I too am having difficulty as a Windows 10 Home user setting this as my default browser. Even though I have run Iron as administrator and have selected SRWare Iron as the default browser in the control panel, the problem persists in spite of everything being in place. So far this minor annoyance does not affect the basic functionality, so I am just glad to have something other than Security-Swiss-Cheese-Firefox, or any of the other problematic browsers that I've tried.
UPDATE: Apparently, selecting "Chrome" instead of SRWare Iron solves the problem. I know Iron is based off of Chrome, but I'm still confused, as I downloaded the latest version of SRWARE and never had any contact with Chrome in the past.