If you are using the Master Slider version 3.4.0 or lower, you may notice that the auto-update is now working properly.
This problem is resolved in the new version 3.4.2 and all you need to do is manually upgrade to the latest version.
The manual update is basically the same process as installing the plugin for the first time. You just need to deactivate and delete the plugin first.
After that, grab the latest version from the marketplace and install it. Here is our documentation for that: