https://managewp.com/blog/downgrading-wordpress-plugins
The first option for rolling back a WordPress plugin to an older version is to do so manually through the WordPress Plugin Directory. To get started, you’ll want to head to the directory and use the search bar to navigate to the plugin you’re looking to downgrade.
https://wordpress.org/plugins/
Once you locate the plugin page, click on the Advanced View link in the right-hand sidebar:
Select the version you need
Download it
Next, go to your WordPress dashboard and navigate to the Plugins tab. Select Add New, and then Upload Plugin. Choose the .zip file of the older version from your computer, then hit Install Now. This will automatically unzip the file for you:
Now upload it
Choose it
Yes
And you are done
