Apologies for the problem regarding your BoldGrid Connect Key and the error ("API key appears to be invalid!") that you are seeing. I recommend reinstalling BoldGrid to ensure you are running the latest version, then retrying to enter your Connect Key. If you have tried this already, please email email@example.com from the email address that you used to receive the Connect Key so that the issue can be investigated in more depth by BoldGrid team.
Customer support service by UserEcho