"Invite to eM Client" button sends 4 invitation emails

The “Invite to eM Client” button sends 4 invitation emails to everyone in my address book! Why would this happen?

I am using emClient v4.0. I am afraid to even start up emClient until I know what is going on here !?!?!

Thanks for your help.

Hello,
I have tested it right now and it works OK, Are you sure you did not select one contact multiple times?