I got this problem also after I switch back from Windows 10 to Windows 7 for compability hardware problem. After go in Win 7 and download latest Hamachi from website I can't solve this triangle problem by every explanation I get from internet. Fortunately, I remember I still have my hard drive backup in 2014 and find my old Hamachi saved ver 6.0.2.2, driver date 14/05/2007. After I installed it the triangle problem dissapear and my Hamchi can connect to the network. I didn't do update and just use my old Hamachi. Hope this will help you.
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