Hello @drakus72
The button is grayed out because the plugin does not have the updated info. The way the info is saved in ver 2 is very different from the previous versions
Here are the steps to make the custom domain button active.
Visit SSL Manager page
Enter Access ID and Secret Key
Click List Certificate
If you had the SSL certificate eaelier, you should see a message
SSL Certificate can now be used with Cloudfront CDN. Proceed to Cloudfront Setup
Return to the AWS CDN page
Disable the CDN
Reset the CDN
Reload the Page
Select I would like to use a custom CDN domain
. The certificate ARN field will be auto populated
Click Create Distribution
. This will not create a new disbrituion but will update the plugin with the info needed
Click the green check mark icon