When you updated to the latest version, we clearly mention about the changes to the account status.
We see that you purchased RealPlayer Plus v.18. If you installed RealPlayer v.20/20, you will need to upgrade to activate Plus features in RealPlayer v.20 as this is a different product with additional new features. If you want to upgrade, please let us know. As a loyal user, you are eligible for a discount.
If you don't want to upgrade, you will need to uninstall RealPlayer v.20 and install RealPlayer v.18. You can install RealPlayer v.18 by clicking this link.
Once you have installed RealPlayer v.18, you will need to sign into it to activate your Plus features.