Did the seller "gift" these to your account?

From this Doc:

http://line6.com/support/docs/DOC-2277

I can’t use my licenses anymore. What happened?

Please understand that only the account that purchased the licenses will be able to access the licenses, regardless of who has the device containing the licenses.  If you can’t access this account, you won’t be able to access the licenses contained within it.

For instance, if someone bought a Metal Shop license and assigned it with Line 6 Monkey to his POD XT, then later connected his friend’s POD XT Live to Monkey and allowed that unit to use the model pack, his friend will now no longer be able to use Metal Shop because his friend’s account was not used to make the purchase. The owner would have to “gift” the model pack’s store order to his friend’s account (see how to “gift” below).

Another case is a father using his Line 6 account to buy a model pack for his daughter. He’d have to “gift” the purchase to her account for her to have access to the model pack.

Another scenario involves licenses purchased online. Line 6 is the only authorized seller of licenses for use with Line 6 devices. If you purchased Line 6 licenses from anywhere other than the Line 6 website, the licenses were originally purchased using a Line 6 user account other than your own and the licenses have reverted to that account. The account owner would have to “gift” the store order to you in order for you to use the licenses you purchased from that individual. Line 6 plays no part in this situation.

What if I sell my device? What happens to my licenses?

If you intended to sell your licenses with the device, then you can “gift” the relevant store order(s) to the buyer.

If you didn’t intend to sell your licenses with the device, when the buyer runs the License Manager and logs in, it will prompt him to authorize the hardware, which will remove the device authorization from your account and restore the licenses for use with your account.

How do I “gift” a store order?

Log in to your Line 6 account, visit the Purchase History page, and click the Details link for the order.  Click the link/button labeled "gift", then enter the destination Line 6 account username and click confirm.  The order will still show in your account history, but you will not have access to the license(s) from the order, be able to return it, or be able to gift it again. The giftee's account will display the order on the Purchase History page, but not be able to return or gift it.  The account holder will have access to all the license(s) in the order.