I understand your frustration, sorry about the experience you are having. We recently did a major re-factor of the code to comply with recommended WordPress standards. As a part this exercise we had to remove 3.x code & UI from the latest version of plugin.
Just to re-imphasis – We have not removed ANY free features and put them behind a paywall, this confusion is arising from the fact that you are now seeing the new v4.x UI (which was infact released almost a year ago).
All your existing functionalities & features are still intact, however you may need to explore the UI to find the relevant option as we have moved things around to make the plugin modern & easy to use. Still, if you find any feature was free but now its removed or has been moved to paid plugin, let me know I will check with the team and revert back quickly.
Please update to the latest version if you see any issues.