Problems Registration Avast Pro for Macs

[Miriell]

I have installed Avast for Macs and I am trying to register my product but the registration form won't accept my valid email address even though this forum has!  Please can you tell me how I can officially register my product cos every time I try I can't get any further and I have only a few days left of my trial period.  Thanks 

[krahulik]

Hello,
  I can't you advice much as I don't neither know the format of yours email address nor the error message you get. You could try to use some other address.

Best Regards,
  Martin