Hi clifcampb and welcome to our community
I stand to be corrected here, but I believe those buttons in
FlashHelp exist as Flash objects that are placed where the images
would normally be found in a traditional WebHelp output. Because of
this, I think you would need to dissect the supporting Flash files
and make changes there. This requires a couple of things.
1. Having the Adobe Flash application
2. Knowing which files to edit and how to make such edits
I believe a "FlashHelp System Development Kit" is shipped
with RoboHelp and can be found among the files you see in the
general location where RoboHelp has been installed. So assuming you
have the prerequisite requirements of Flash and knowing how to use
it, you might be successful in making the changes you need.
Cheers... Rick