1.6.10 was released for Pro and Free. It fixed a critical bug that auction items cannot be added JoyBidder due to changes eBay made during the last weekend. The fix was released within 5 hours when the issue was first reported. Existing users should upgrade to 1.6.10 as soon as possible. If you don't want to wait for the scheduled auto-update alert, you can upgrade manually.
Note: If you are using the Free version for Firefox, due to the Mozilla's rigid review process, the new version will be reviewed by AMO reviewers before it can be made public. (it could take 3 to 5 days).