I had this issue and it drove me crazy. I uninstalled, reinstalled, changed advanced settings, changed firewall settings. FINALLY got it working, not sure which part of this did the trick but here it goes:
- Uninstall Hamachi
- If the Hamachi Network Card is still there, delete it.
- Reinstall Hamachi, rejoin network.
- Ping will not respond and relayed tunnel shows with yellow triangle.
- WITHOUT uninstalling first, RERUN the Setup. Take all of the defaults.
After this I was up/up on everything. Hope it helps.