I just purchased Synplant through Plugin Boutique, but I'm unable to register the plugin via the prompt that shows up in my DAW. In my Plugin Boutique account, I can see a redemption code under Synplant, but whenever I paste it into the aforementioned registration window it doesn't work. I'm also unable to use the Sonic Charge Authenticator because that only directs me to plugins I've purchased directly through Sonic Charge.

Hey. I get this question all the time. I am not sure why Plugin Boutique struggles to get this information across to their customers. To redeem the code you receive from them, you need to visit https://soniccharge.com/redeem