The OP Cloud service sends a verification email to the email address you used to sign up for your account. Look for the verification email in your inbox and click the link in that email.
The welcome email contains a welcome message and instructions for getting started.
You can download the latest version of OP Cloud here - https://opcloud.fitosoft.com/#download . Each web browser has slightly different instructions for launching the installer. Go to your Downloads folder and double-click on your setup file to start your installation.
Enter your email/password or Access Key ID in email notification. Click OK.
Open your web browser and navigate to the OP Cloud login page at https://opcloud.fitosoft.com/login.html.