These steps need to be followed when you have trouble in updating the plugin.
1. Please make sure that you are still having a license key. If your license is expired, please re-purchase to get updates.
2. If you have a valid license key, please go to the license key page.
3. Deactivate the license.
4. Activate it again.
5. Now go to the plugins page and try to update the plugin. You will succeed.
NB: If you are having any trouble in deactivating or activating the license, please contact us.