Click a product version in LimeLM, on the right hand side there's a "Delete" link. Click that. Once all the versions have been deleted from a product, the product itself disappears. Then you can downgrade.
Click a product version in LimeLM, on the right hand side there's a "Delete" link. Click that. Once all the versions have been deleted from a product, the product itself disappears. Then you can downgrade.