Any question regarding the moving of Formidable Forms would need to be asked on Formidable’s support site.

Regarding the PRO2PDF activation key, you may log in to the plugin’s website here to disable the activation key for the current URL, then enter the activation key into the new URL.

If you used any Formidable Field ID’s, it may be necessary to update them, however, Formidable Keys will remain the same.

Whatever you do, make sure you backup everything.

There are a lot of possible issues when moving a WP installation depending on your configuration and the cloning plugin. Let us know if you have any issues as we remain at your service.