For improved reliability, InfiniteWP admin panel now connects to the WP sites using the wp-admin URL by default, instead of the site URL. If your wp-admin link is protected or dynamic, you may face some issues.
If your wp-admin is folder-protected, enter the wp-admin URL and enter the credentials under FOLDER PROTECTION before adding the site.
If your wp-admin is dynamic and you want to use the site URL instead, enter the SITE URL and then select CONNECT USING SITE URL under ADVANCED before adding the site.
If you would rather revert to connecting using the site URL for all your sites, you can do so by adding this line to the config.php file.
For other improvements, view the Change log.
The next update is going to be a huge one, focused more on new features and UX improvements. Have a look out for that.