eMClient free download will not activate

Since trying to download the latest version of eMClient, I have had the following difficulties :-

  1. When I try to “activate” the new free version, the downloaded program refuses to accept the “activation key” sent by eMClient.

  2. When I try to connect eMClient to my server, it refuses to accept my email password that I know is correct, as I’ve used that same password to connect other machines to the sever (webmail).

  3. I’m coming to the end of the “trial period” of eMClient, so should I just allow that to lapse and then try all over again? Or is there a way through?