The plugin update will delete all your current related settings. That is why you need to re-save settings to ensure plugin update won’t affect negatively on the site work.
Please follow the Pricing Plans section where you can find all the relevant information on how to add plans to your site.
For more detailed information please visit the following sources: https://support.rightpress.net/hc/en-us/articles/201771385-Features https://support.rightpress.net/hc/en-us/sections/200327549-Documentation-pre-3-0-