These are AE ERC20 tokens you have which means you can either transfer them to a wallet that supports the AE ERC20 token or migrate them to receive AE Mainnet tokens.
The æternity Mainnet was launched in November 2018 and we are currently in the second phase of AE token migration. Learn more about the migration below:
Bear in mind that if you migrate now, your tokens will be locked until the next hard fork - scheduled for May 2019.
After you access them you’ll be able to trade them on exchanges that support the Mainnet token only - you can find them here:
Let us know if you have questions,