I'm sorry for the lack of help you're gaining, and i'm here to break that!
Yes, that Export Highlighted button spits out a file that is the whole preset.
Select a preset you wish to export and click the button.
On doing so, you get an option to export all settings with it, or just the triggers only. I'm not convinced that it saves the settings properly so you should screenshot your current settings to keep them safe.
I don't think there's a way to export all presets at once, but It's not that hard to export and save a backup!
On second thought, Are you wishing to export your current preset with all the other active presets mixed into the master you're using? In this case It's quite a hassle as you'd need to merge the triggers from the other presets into your master by copy-pasting them into the master. like, actually merge them properly. Once you've done this then you can export the one that has everything within it. Not sure my explanation about that one is fluent.
To share preset files, (.bttpreset) to the community, upload them here: https://share.folivora.ai (save the link!)
It is in beta though, so if your downloders are having issues (mine did) then you can just drag the preset into the editing box. It'll upload it and attatch it fine.
Hope that helped!