The reset password link would be the only way really, since the password in the database itself is encrypted (and cannot be de-encrypted).
The default password for first-time login (I thought) was "machform" (all lowercase, one-word).
You should probably log a support ticket with Appnitro (through your customer area) for this problem, since it's beyond the scope of the forum, and concerns something specific to your installation of Machform.