Trouble re-sending invitation for remote assistance in windows 7.

A year and a half ago I connected to my friends computer via remote assistance to help him with a problem.
He did so by way of sending me an invitation via an assistance email attachment. We connected fine I helped him with his problem and all was well.

He needed assistance again last night and he went to send me an invitaion just like we did last time but there is a problem. When he types in "Windows remote assistance" in the search box and brings up windows remote assistance he does not get the box that says "Do you want to ask for or offer help?" He is getting some other box. Like he has already sent an invitation or something. Wish I could give more detail by my friend is HIGHLY computer illiterate.

I still had the email with the invitation file that he sent me last year and I clicked on it but it is asking for the password that we originally used to connect. Neither of us know what that password is.

Is there anyway that he can "reset" his invitation settings so that we can start from scratch and he can re-send an invitation to me?

Thanks
P.S. Both of our computers are running windows 7.

Thanks for the help. I log on via Team viewer and when you type in "Windows remote assistance" in the search box it does not show windows remote assistance....