Is there any way to change the Bitlocker Recovery Key?
You can change the recovery password without decrypting in one of two ways 1) using the manage-bde tool or 2) using the Win32_EncryptableVolume WMI interface. The first method doesn't require any programming/scripting so we'll go that route.
Assume X: is the BitLocker protected drive you want to change recovery password for.
And you're done! You've changed your recovery password.
Note: If you get an error when you try to delete the recovery password, this is likely because a recovery password is required by Group Policy on your system. To get around this, first suspend BitLocker with