Which one do I need?
If you are the one helping, download HelpBuoy Desk. If someone is going to help you, download HelpBuoy for Windows and ask them for their relay address.
New to HelpBuoy? The guide walks you through the first setup.
Updates
HelpBuoy for Windows checks for a new version when it starts and offers to install it. It never does this while someone is helping you.
All releases, release notes and checksums are on GitHub.