Note: If you have purchased WatuPRO less than one year before the time when you want an upgrade, you are eligible to get it for free. Otherwise the price of the upgrade is 50% of the full price.
Here is how to process the upgrade without losing your exam data:
1. In your Wordpress admin go to Settings, then to Watu PRO Settings. Make sure the checkbox saying "Delete Watu PRO data when uninstalling the plugin." is NOT checked. See on the picture:
2. Deactivate the plugin.
3. Delete the plugin.
4. Upload the new zip file via Plugins -> Add New -> Upload
5. All done. Your exam and taking data is all there and old exams will keep working as is.
Go to Watu PRO official page.