No. You can also authenticate with your Google Account. We have you authenticate with either Google or Facebook in order to confirm that you will be the sole user of the software. If you choose to authenticate with Facebook and do not already have a Facebook account, you will need to create one for this purpose.
You have been issued a single license which is tied to you as a person, not to any single computer. By connecting your license to your Google or Facebook account, you can use our software on multiple computers.
You can rest assured that our software will not interact with your Facebook account in any way other than this initial confirmation of your identity.