Can't add additional email accounts

Hi,
I just downloaded your program. I used to use Eudora, and this is the most similar. However, I have added my main email account to the program and have collected mail from there.I have 3 other email accounts, all with this same ISP but the program won’t allow me to add these accounts into the program. It doesn’t allow me to get past the authentication required window. It keeps timing out and I can get no further. Could you please let me know if I might be doing something wrong that causes me not to be able to add these accounts?
Thankyou.

Hello,

if you have free license you can only add 2 email accounts into eM Client.

regards
Jan