How do I log in to my Hamchi account on the client

Hello guys, pleas help! )
I just re-installed my windows and when I installed the Hamachi client I noticed that I can not log in to my account, meaning on Hamachi there are only two options, on is "Create a new network..." and the other is "Join an existing network...", but I don't wanna joint to anybodies network, also I don't wanna create a new one,, I just wanna Enter to my previously created network, but How ???
I am clearly missing something ! but what I can't seam to be able to figure out.
So pleas help :))
Thanks

I'm not exactly sure what you mean by Hamchi account. Where was the old network created for it?

I mean the network ID I had previously created! Now how do I use that ID again, that my friends can connect to it?

Is this an external device that your connecting to or something within window 7. Could you post a link about the hamchi your trying to connect to?

Update. I looked into it its a vpn client. If the vpn was configured on your windows 7 machine you will have to reconfigure it.

If it configured to connect else where you can probably connect to existing option.

Oops meant to edit.